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

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MnStatusDetails
11621957Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
507647081771135.6old
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-09-21mrh39303EE52550B0E81924504353
History
DateUserTypeResult
2025-06-10yuriy_5-1NF
no factor from 2^70 to 2^71
2025-05-05yuriy_5-1NF
no factor from 2^69 to 2^70
2025-03-28yuriy_5-1NF
no factor from 2^68 to 2^69
2025-03-11yuriy_5-1NF-PM1
B1=6973170, B2=448721460
2025-02-10yuriy_5-1NF-PM1
B1=4648780, B2=600169020
2024-06-17yuriy_5-1NF-PM1
B1=262144, B2=137022600
2021-09-22DerekCERT
PRP Certification
Proof certified good
2021-09-21mrhC-PRP
M11621957/50764708177 : 39303EE52550B0E8
PRP proof power = 8
PRP: Verified
Proof certified good