Marin Mersenne 2^P-1
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MnStatusDetails
2487047Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
10247378301681927753865512579.82020-12-30 06:02:15
ECM
DigitsB1Curves
255000097 / 280
Estimated T-Level: 21.7 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Michael Kostashuk9461DA2FA7CDE5E90
Verified (Factored)1999-09-30Jason Day9461DA2FA7CDE5E9385312
Verified (Factored)2018-05-31kkmrkkblmbrbk9461DA2FA7CDE5E91524414
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-12-31Niels_Mache_Nextcloud80B8AB73C8D3F1D11156995353
History
DateUserTypeResult
2020-12-31Ben DeloCERT
PRP Certification
Proof certified good
2020-12-31Niels_Mache_NextcloudC-PRP
M2487047/1024737830168192775386551 : 80B8AB73C8D3F1D1
PRP proof power = 7
PRP: Verified
Proof certified good
2020-12-30lycornF-ECM
Factor: 1024737830168192775386551 / (ECM curve 3, B1=50000, B2=5000000, Sigma=6536110349691248)
2019-06-03TJAOINF
no factor from 2^67 to 2^68
2018-05-31kkmrkkblmbrbkC-LL
9461DA2FA7CDE5E9
2017-07-24Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-30ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2014-11-17mikrNF-PM1
B1=2382500, B2=85770100, E=12
2014-09-03JossNF-PM1
B1=120807
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-10Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-22Oscar ÖstlinNF-PM1
B1=95000, B2=1947500, E=6
2010-12-22JossNF-PM1
B1=20000
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61