Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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MnStatusDetails
11621321Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
15521478164355611650.5old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-09-22LaurV1268AF9C407ADBDD1605153553
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=6972792, B2=448721460
2025-02-10yuriy_5-1NF-PM1
B1=4648528, B2=600169020
2024-06-17yuriy_5-1NF-PM1
B1=262144, B2=137022600
2021-09-22Ben DeloCERT
PRP Certification
Proof certified good
2021-09-22LaurVC-PRP
M11621321/1552147816435561 : 1268AF9C407ADBDD
PRP proof power = 8
PRP: Verified
Proof certified good