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

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MnStatusDetails
5277163Factored
FactorDigitsBitsDate
50057502521760686119603632055240110059339128.62021-12-18 02:04:52
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Andrea Dyballa77635D9B8C40056D2549415
Verified (Factored)1999-09-22Man Wong 77635D9B8C40056D1864848
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-12-18Tucker Kao9B033053F2A242511340879353
P-1 factors
DateFactorB1B2
2021-12-1850057502521760686119603632055240110059380000004006849770
History
DateUserTypeResult
2021-12-18curtiscCERT
PRP Certification
Proof certified good
2021-12-18Tucker KaoC-PRP
M5277163/500575025217606861196036320552401100593 : 9B033053F2A24251
PRP proof power = 7
PRP: Verified
Proof certified good
2021-12-18axnF-PM1
Factor: 500575025217606861196036320552401100593 / (P-1, B1=8000000, B2=4006849770)
2021-10-10SRBaseNF
no factor from 2^71 to 2^72
2021-10-05axnNF-PM1
B1=8000000, B2=400000000
2021-08-31SRBaseNF
no factor from 2^70 to 2^71
2021-08-18SRBaseNF
no factor from 2^69 to 2^70
2020-10-26TJAOINF
no factor from 2^68 to 2^69
2019-06-29USAFSSNF-PM1
B1=315000, B2=9292500, E=12
2018-06-17ramgeisNF
no factor from 2^67 to 2^68
2016-06-07Gordon SpenceNF
no factor from 2^66 to 2^67
2015-01-31NumberwangNF
no factor from 2^65 to 2^66
2014-12-22VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-22VictordeHollanderNF
no factor from 2^63 to 2^64
2010-07-19Squeeky_SquirrelNF-PM1
B1=60000, B2=975000, E=6
2009-08-24Carsten KossendeyNF-PM1
B1=25000, B2=337500
2009-06-04GrunwalderGIMPNF
no factor from 2^62 to 2^63