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

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MnStatusDetails
8265821Composite, with 7 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
66126569826.0old
903288918891136.42008-09-08 04:28:56
1378738942811237.02008-09-08 04:28:56
120280094281511443.52008-09-08 04:28:56
215068561915431444.32008-09-08 04:28:56
1214034193554011546.82008-09-08 04:28:56
1040573385272549833032166.52019-06-18 03:31:43
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2018-09-29rucioED7F73994D2AB7E36436528153
Verified2019-06-18Niels_Mache_NextcloudED7F73994D2AB7E37773622053
History
DateUserTypeResult
2025-03-12beepNF-PM1
B1=1750000, B2=9233462700
2022-11-28LordJuliusNF
no factor from 2^68 to 2^69
2022-11-28LordJuliusNF
no factor from 2^67 to 2^68
2022-11-28LordJuliusNF
no factor from 2^65 to 2^66
2022-11-28LordJuliusNF
no factor from 2^64 to 2^65
2021-08-26Seth_TrNF-PM1
B1=250000, B2=10200000
2019-12-17Seth_TrNF
no factor from 2^67 to 2^68
2019-06-18Niels_Mache_NextcloudC-PRP
M8265821/66126569/90328891889/137873894281/12028009428151/21506856191543/121403419355401/104057338527254983303 : ED7F73994D2AB7E3
PRP: Verified
PRP without proof (not generated)
2019-06-18Seth_TrF
Factor: 104057338527254983303 / TF: 66-67
2018-09-29rucioC-PRP
M8265821/66126569/90328891889/137873894281/12028009428151/21506856191543/121403419355401 : ED7F73994D2AB7E3
PRP: Verified
PRP without proof (not generated)
2008-09-08Will EdgingtonF
Factor: 121403419355401
2008-09-08Will EdgingtonF
Factor: 21506856191543
2008-09-08Will EdgingtonF
Factor: 12028009428151
2008-09-08Will EdgingtonF
Factor: 137873894281
2008-09-08Will EdgingtonF
Factor: 90328891889