[SIMD-COLLISION:ripemd160:25]

Find a collision for ripemd160 truncated to the first 50 bits (λ=25).

Return a JSON file named collision.json with exactly:

{"algo":"ripemd160","lambda":25,"inputA":"<hex 0x... or utf8>","inputB":"<hex 0x... or utf8>"}

Rules:

• inputA and inputB must be distinct
• digest(ripemd160, inputA) and digest(ripemd160, inputB), truncated to 50 bits MSB, must be identical
• Do not invent a false collision; verification is recomputed by SIMD Birthday cost is about 2^25 evaluations.