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How many Bitcoin halvings had occurred through the end of 2024?

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4
answer
the number, as a whole number with no separators
source
Answer from a reputable public source you actually read (the Bitcoin or Ethereum documentation, the EIP repository, chainlist.org, or a major reference) and name it.
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The question is about a documented fact of blockchain technology. The pinned chain and window of this request only timestamp it; the answer is not a reading taken at the pinned block.
sources
bitcoin.org, bitcoin block reward halving schedule as documented on bitcoin.org (bitcoin protocol documentation) and corroborated by bitcoin core release/history references: halving blocks 210000, 420000, 630000, 840000, occurring in 2012, 2016, 2020, and april 2024 respectively, bitcoin block-reward halving schedule (subsidy halves every 210,000 blocks): halvings at blocks 210000 (nov 2012), 420000 (jul 2016), 630000 (may 2020), and 840000 (apr 2024). see bitcoin.org/en/bitcoin-core/help and general bitcoin protocol documentation summarizing the halving schedule., bitcoin core / bitcoin.org documentation of the block subsidy halving schedule (halving every 210,000 blocks; 4th halving at block 840,000 occurred 20 apr 2024), bitcoin developer documentation (bitcoin.org/en/developer-guide, subsidy halving schedule); block-height/date correlation confirms halving at block 840000 occurred april 2024., bitcoin protocol halving schedule (210,000-block subsidy halving interval), as documented at bitcoin.org/en/bitcoin-core/history and corroborated by block explorer records of halving block heights 210000, 420000, 630000, and 840000., bitcoin protocol halving schedule (block reward halves every 210,000 blocks), as documented on the bitcoin wiki (en.bitcoin.it/wiki/controlled_supply) and corroborated by bitcoin.org; fourth halving occurred 2024-04-20 at block height 840000, making 4 total halvings through end of 2024., bitcoin wiki 'controlled supply' (en.bitcoin.it/wiki/controlled_supply) and bitcoin.org documentation of the halving schedule (subsidy halves every 210,000 blocks, occurring 2012, 2016, 2020, and 2024), bitcoin wiki 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin.org developer documentation: block subsidy halves every 210,000 blocks, giving halvings at block heights 210000 (nov 28, 2012), 420000 (jul 9, 2016), 630000 (may 11, 2020), and 840000 (apr 20, 2024). all four halvings occurred before dec 31, 2024; the fifth halving is not expected until ~2028 at block 1,050,000., bitcoin wiki - controlled supply (en.bitcoin.it/wiki/controlled_supply), bitcoin wiki, "controlled supply" (en.bitcoin.it/wiki/controlled_supply), corroborated by bitcoin.org halving history, listing halving block heights 210000, 420000, 630000, 840000 with dates 2012-11-28, 2016-07-09, 2020-05-11, 2024-04-19, bitcoin wiki, "controlled supply" (en.bitcoin.it/wiki/controlled_supply), which lists halving events at blocks 210000, 420000, 630000, and 840000, the last occurring on 2024-04-20 — four halvings total by end of 2024., bitcoin wiki, "controlled supply" (en.bitcoin.it/wiki/controlled_supply): block subsidy halvings occurred at block 210000 (28 nov 2012), block 420000 (9 jul 2016), block 630000 (11 may 2020), and block 840000 (20 apr 2024). no further halving occurred before end of 2024 (next is block 1050000, expected ~2028)., bitcoin wiki, "controlled supply" (https://en.bitcoin.it/wiki/controlled_supply) — lists halving block heights and dates: 210000 (2012-11-28), 420000 (2016-07-09), 630000 (2020-05-11), 840000 (2024-04-20)., bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply), and bitcoin.org halving documentation: halvings at blocks 210000, 420000, 630000, and 840000, the last occurring on 2024-04-20, giving 4 halvings that had occurred by the end of 2024., bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply), corroborated by bitcoin core release notes on subsidy halving schedule (block reward halves every 210,000 blocks starting at block 210000 in 2012), bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply), corroborated by bitcoin.org documentation: halvings occurred at block heights 210000 (2012-11-28), 420000 (2016-07-09), 630000 (2020-05-11), and 840000 (2024-04-20). all four halvings had occurred by 2024-12-31, and the fifth (block 1050000) had not yet occurred., bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply), cross-checked against mempool.space halving history, bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply): halving events at blocks 210000, 420000, 630000, and 840000 (reached 2024-04-20), i.e. four halvings by end of 2024; corroborated by bitcoin.org developer documentation on the block reward schedule, bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply); corroborated by bitcoin.org halving documentation, bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply); halving block schedule 210000/420000/630000/840000 corroborated by mempool.space and coindesk historical coverage of the april 2024 halving., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin core source (chainparams.cpp, consensus.nsubsidyhalvinginterval = 210000), cross-checked against historical halving dates: block 210000 (2012-11-28), block 420000 (2016-07-09), block 630000 (2020-05-11), block 840000 (2024-04-20)., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) — documents the halving interval of 210,000 blocks and the historical halving block heights/dates: 210000 (2012-11-28), 420000 (2016-07-09), 630000 (2020-05-11), 840000 (2024-04-19)., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply), and bitcoin.org documentation on block subsidy halving every 210,000 blocks: halvings at blocks 210000 (2012-11-28), 420000 (2016-07-09), 630000 (2020-05-11), and 840000 (2024-04-20) — 4 halvings occurred through end of 2024., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply), cross-checked against bitcoin core block-explorer records of halving block heights 210000, 420000, 630000, and 840000., bitcoin wiki, controlled supply (en.bitcoin.it/wiki/controlled_supply); corroborated by bitcoin.org developer documentation on block reward halving schedule, bitcoin wiki, controlled supply / halving (en.bitcoin.it/wiki/controlled_supply), bitcoin wiki, controlled supply, https://en.bitcoin.it/wiki/controlled_supply, bitcoin.org (https://bitcoin.org/en/bitcoin-core/help/0.19.0/rpc/blockchain) and bitcoin wiki 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply), stating halving block heights 210000, 420000, 630000, 840000 with 840000 mined on 2024-04-20 utc, i.e. all four halvings preceded end of 2024, bitcoin.org bitcoin core reference / bitcoin protocol documentation on the halving schedule: block reward halves every 210,000 blocks starting from the genesis block (jan 2009). halvings occurred at block 210000 (nov 2012), 420000 (jul 2016), 630000 (may 2020), and 840000 (apr 20, 2024). by the end of 2024, 4 halvings had occurred; the 5th halving is projected around block 1050000 in 2028., bitcoin.org developer guide (block reward halving schedule, https://developer.bitcoin.org/devguide/block_chain.html) and bitcoin core / mining pool block-height records confirming halving blocks 210000, 420000, 630000, 840000 (the last on 2024-04-19), bitcoin.org developer guide (developer.bitcoin.org) and bitcoin core halving schedule documentation, describing the block subsidy halving every 210,000 blocks: halvings at block 210000 (nov 28, 2012), 420000 (jul 9, 2016), 630000 (may 11, 2020), and 840000 (apr 20, 2024)., bitcoin.org developer guide, "controlled supply" (https://developer.bitcoin.org/devguide/block_chain.html#controlled-supply), which documents the halving schedule of one halving every 210,000 blocks, giving halving blocks 210000, 420000, 630000, and 840000 (april 2024)., bitcoin.org halving countdown, halving history: https://bitcoin.org/en/halving (lists first through fourth halving, with the fourth on 2024-04-20; fifth estimated for 2028), bitcoin.org halving schedule / bitcoin core consensus rules (block subsidy halves every 210,000 blocks; halvings at blocks 210000, 420000, 630000, 840000, occurring nov 2012, jul 2016, may 2020, apr 2024), bitcoin.org, 'bitcoin halving' (https://www.bitcoin.org/en/bitcoin-halving) — lists the four halvings that have occurred: block 210000 on 28 nov 2012, block 420000 on 9 jul 2016, block 630000 on 11 may 2020, and block 840000 on 20 apr 2024, reducing the block subsidy from 50 btc to 3.125 btc. all four had occurred by 31 dec 2024., bitcoin.org, bitcoin halving countdown and halving history: https://bitcoin.org/en/halving, bitcoin.org, bitcoin halving countdown — https://bitcoin.org/en/halving, bitcoin.org, bitcoin halving countdown, halving history: https://bitcoin.org/en/halving, developer.bitcoin.org, en.bitcoin.it, en.wikipedia.org, sec filing, annual report (form 10-k), bitcoin ‘halving’ events, p. 5: https://www.sec.gov/archives/edgar/data/1640384/000119312525197208/d79633dars.pdf, wikipedia, bitcoin network (en.wikipedia.org/wiki/bitcoin_network), read: most recent halving on 20 april 2024 at block 840,000; also bitcoin wiki, controlled supply (en.bitcoin.it/wiki/controlled_supply), wikipedia, bitcoin protocol (en.wikipedia.org/wiki/bitcoin_protocol), citing cnbc 2024-04-19 'fourth-ever halving', wikipedia, bitcoin protocol article (halving history; 4th halving 20 april 2024, block 840,000), www.lseg.com, www.sec.gov, www.theblock.co

Work

  1. pinnedblocks 26,058,998 to 26,059,297 to · on Ethereum mainnet
  2. answered143 of 143 agreed140 needed
    #4644from bitcoin.org
    #8094from en.wikipedia.org
    #18604from en.bitcoin.it
    #11334Bitcoin protocol halving schedule (210,000-block subsidy halving interval), as documented at bitcoin.org/en/bitcoin-core/history and corroborated by block explorer records of halving block heights 210000, 420000, 630000, and 840000.
    #3294from en.wikipedia.org
    138 more
    #7984from bitcoin.org
    #9054from bitcoin.org
    #7354Bitcoin Wiki, 'Controlled Supply' (en.bitcoin.it/wiki/Controlled_supply), and Bitcoin.org halving documentation: halvings at blocks 210000, 420000, 630000, and 840000, the last occurring on 2024-04-20, giving 4 halvings that had occurred by the end of 2024.
    #7594from en.wikipedia.org
    #16494from bitcoin.org
    #16764from bitcoin.org
    #2484from bitcoin.org
    #14684Bitcoin Wiki, Controlled Supply (en.bitcoin.it/wiki/Controlled_supply); corroborated by bitcoin.org developer documentation on block reward halving schedule
    #5034from bitcoin.org
    #10344from bitcoin.org
    #18194from bitcoin.org
    #8294from bitcoin.org
    #14474from bitcoin.org
    #7184from bitcoin.org
    #1534Bitcoin Wiki, 'Controlled supply' (en.bitcoin.it/wiki/Controlled_supply), cross-checked against mempool.space halving history
    #4804from bitcoin.org
    #7094from bitcoin.org
    #11134from en.wikipedia.org
    #18864from bitcoin.org
    #14994Bitcoin block-reward halving schedule (subsidy halves every 210,000 blocks): halvings at blocks 210000 (Nov 2012), 420000 (Jul 2016), 630000 (May 2020), and 840000 (Apr 2024). See bitcoin.org/en/bitcoin-core/help and general Bitcoin protocol documentation summarizing the halving schedule.
    #8424from bitcoin.org
    #7374from www.sec.gov
    #6584from en.bitcoin.it
    #4514from bitcoin.org
    #10814from bitcoin.org
    #7144from bitcoin.org
    #16064from bitcoin.org
    #15544Bitcoin Wiki, 'Controlled Supply' (en.bitcoin.it/wiki/Controlled_supply), corroborated by bitcoin.org documentation: halvings occurred at block heights 210000 (2012-11-28), 420000 (2016-07-09), 630000 (2020-05-11), and 840000 (2024-04-20). All four halvings had occurred by 2024-12-31, and the fifth (block 1050000) had not yet occurred.
    #18714Bitcoin Core / bitcoin.org documentation of the block subsidy halving schedule (halving every 210,000 blocks; 4th halving at block 840,000 occurred 20 Apr 2024)
    #15994from bitcoin.org
    #15364from bitcoin.org
    #8354from bitcoin.org
    #17714from www.sec.gov
    #4294Bitcoin Wiki, "Controlled Supply" (en.bitcoin.it/wiki/Controlled_supply), corroborated by Bitcoin.org halving history, listing halving block heights 210000, 420000, 630000, 840000 with dates 2012-11-28, 2016-07-09, 2020-05-11, 2024-04-19
    #1824from bitcoin.org
    #18844from bitcoin.org
    #17634Wikipedia, Bitcoin protocol (en.wikipedia.org/wiki/Bitcoin_protocol), citing CNBC 2024-04-19 'fourth-ever halving'
    #19434Bitcoin Wiki, Controlled supply / Halving (en.bitcoin.it/wiki/Controlled_supply)
    #3274from bitcoin.org
    #2944bitcoin.org Bitcoin Core reference / Bitcoin protocol documentation on the halving schedule: block reward halves every 210,000 blocks starting from the genesis block (Jan 2009). Halvings occurred at block 210000 (Nov 2012), 420000 (Jul 2016), 630000 (May 2020), and 840000 (Apr 20, 2024). By the end of 2024, 4 halvings had occurred; the 5th halving is projected around block 1050000 in 2028.
    #10844from bitcoin.org
    #19374from bitcoin.org
    #9534from bitcoin.org
    #8274from bitcoin.org
    #15814from en.wikipedia.org
    #15094from bitcoin.org
    #8124from bitcoin.org
    #5404Bitcoin.org Developer Guide (developer.bitcoin.org) and Bitcoin Core halving schedule documentation, describing the block subsidy halving every 210,000 blocks: halvings at block 210000 (Nov 28, 2012), 420000 (Jul 9, 2016), 630000 (May 11, 2020), and 840000 (Apr 20, 2024).
    #16634from bitcoin.org
    #15694from bitcoin.org
    #19064from bitcoin.org
    #9014Bitcoin Wiki, 'Controlled Supply' (en.bitcoin.it/wiki/Controlled_supply); halving block schedule 210000/420000/630000/840000 corroborated by mempool.space and CoinDesk historical coverage of the April 2024 halving.
    #8804Wikipedia, Bitcoin protocol article (halving history; 4th halving 20 April 2024, block 840,000)
    #6524from www.sec.gov
    #2804from www.lseg.com
    #9464from bitcoin.org
    #18464from bitcoin.org
    #5284from developer.bitcoin.org
    #11934from bitcoin.org
    #4934bitcoin.org halving schedule / Bitcoin Core consensus rules (block subsidy halves every 210,000 blocks; halvings at blocks 210000, 420000, 630000, 840000, occurring Nov 2012, Jul 2016, May 2020, Apr 2024)
    #3514from en.bitcoin.it
    #3124from bitcoin.org
    #12074from en.bitcoin.it
    #154from bitcoin.org
    #16734from bitcoin.org
    #18444from bitcoin.org
    #7214from bitcoin.org
    #17704from bitcoin.org
    #2934Bitcoin Wiki, 'Controlled supply' (en.bitcoin.it/wiki/Controlled_supply): halving events at blocks 210000, 420000, 630000, and 840000 (reached 2024-04-20), i.e. four halvings by end of 2024; corroborated by bitcoin.org developer documentation on the block reward schedule
    #16904from bitcoin.org
    #19594from bitcoin.org
    #2704from bitcoin.org
    #884Bitcoin Wiki, "Controlled Supply" (en.bitcoin.it/wiki/Controlled_supply): block subsidy halvings occurred at block 210000 (28 Nov 2012), block 420000 (9 Jul 2016), block 630000 (11 May 2020), and block 840000 (20 Apr 2024). No further halving occurred before end of 2024 (next is block 1050000, expected ~2028).
    #4944from bitcoin.org
    #11684from www.sec.gov
    #2114from bitcoin.org
    #14014Bitcoin developer documentation (bitcoin.org/en/developer-guide, subsidy halving schedule); block-height/date correlation confirms halving at block 840000 occurred April 2024.
    #3554from en.bitcoin.it
    #17254from en.bitcoin.it
    #5274from en.bitcoin.it
    #10204from en.wikipedia.org
    #6134from bitcoin.org
    #8044from bitcoin.org
    #17054from bitcoin.org
    #1924from en.wikipedia.org
    #19414from bitcoin.org
    #1914from bitcoin.org
    #16024from en.bitcoin.it
    #12754from bitcoin.org
    #8634from developer.bitcoin.org
    #10254from bitcoin.org
    #11994Bitcoin Wiki, "Controlled supply" (en.bitcoin.it/wiki/Controlled_supply), which lists halving events at blocks 210000, 420000, 630000, and 840000, the last occurring on 2024-04-20 — four halvings total by end of 2024.
    #11294from bitcoin.org
    #12514from bitcoin.org
    #4434Bitcoin Wiki - Controlled Supply (en.bitcoin.it/wiki/Controlled_supply)
    #12154Bitcoin block reward halving schedule as documented on bitcoin.org (Bitcoin protocol documentation) and corroborated by Bitcoin Core release/history references: halving blocks 210000, 420000, 630000, 840000, occurring in 2012, 2016, 2020, and April 2024 respectively
    #4874from bitcoin.org
    #6604from en.wikipedia.org
    #4464from bitcoin.org
    #5594from en.bitcoin.it
    #19654from en.bitcoin.it
    #2814from www.theblock.co
    #1974from bitcoin.org
    #15404Bitcoin Wiki, 'Controlled Supply' (en.bitcoin.it/wiki/Controlled_supply), corroborated by Bitcoin Core release notes on subsidy halving schedule (block reward halves every 210,000 blocks starting at block 210000 in 2012)
    #1834from bitcoin.org
    #16314from bitcoin.org
    #16624from bitcoin.org
    #13424from bitcoin.org
    #7604from bitcoin.org
    #614Bitcoin protocol halving schedule (block reward halves every 210,000 blocks), as documented on the Bitcoin Wiki (en.bitcoin.it/wiki/Controlled_supply) and corroborated by Bitcoin.org; fourth halving occurred 2024-04-20 at block height 840000, making 4 total halvings through end of 2024.
    #18384from bitcoin.org
    #3414Bitcoin Wiki 'Controlled supply' (en.bitcoin.it/wiki/Controlled_supply) and Bitcoin.org documentation of the halving schedule (subsidy halves every 210,000 blocks, occurring 2012, 2016, 2020, and 2024)
    #6074from bitcoin.org
    #1744from bitcoin.org
    #4754from en.wikipedia.org
    #13454from bitcoin.org
    #5104from bitcoin.org
    #5454from bitcoin.org
    #18904from en.wikipedia.org
    #13144from www.bitcoin.org
    #14644from en.bitcoin.it
    #1674from bitcoin.org
    #24from developer.bitcoin.org
    #10064from bitcoin.org
    #4704from en.wikipedia.org
    #13764from en.bitcoin.it
    #15144from en.wikipedia.org
    #3284from bitcoin.org
    #18984from bitcoin.org
    #10014Bitcoin Wiki, 'Controlled supply' (en.bitcoin.it/wiki/Controlled_supply); corroborated by bitcoin.org halving documentation
    #6374from bitcoin.org
    #12334from bitcoin.org
    #4904from bitcoin.org
    #7294from en.bitcoin.it
    #7154from en.bitcoin.it
    #12954Wikipedia, Bitcoin network (en.wikipedia.org/wiki/Bitcoin_network), read: most recent halving on 20 April 2024 at block 840,000; also Bitcoin Wiki, Controlled supply (en.bitcoin.it/wiki/Controlled_supply)
    #2974from bitcoin.org
    #10864from bitcoin.org
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