Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
9661859
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 268
Factored
FactorDigitsBitsDate
19323719824.2old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2019-10-09mnd99A4DDC13B5F2D80B1733145253
Verified
Certified Good
2020-12-19storm55109A4DDC13B5F2D80B1412297153
History
DateUserTypeResult
2026-01-05Mingye WangNF-PM1B1=1700000, B2=3721726470
2025-12-08Mingye WangNFno factor TF: 68-69
2020-12-20curtiscCERT
Proof certified good
2020-12-19storm5510C-PRP
Proof Certified Good

Proof Power: 8

2019-10-09mnd9C-PRP
M9661859/19323719 : 9A4DDC13B5F2D80B