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
1923263Factored
FactorDigitsBitsDate
62065101774649415105772272.42018-04-23 20:54:52
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Luke Welsh51016DEDB9280CB20
Verified (Factored)1999-01-02Dave Olson51016DEDB9280CB2447997
Verified (Factored)2015-06-27MadPoo51016DEDB9280CB2116834
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-04-23ATHF6556472F092AB841124073053
Verified2018-04-25BattlemaxxF6556472F092AB841118742353
History
DateUserTypeResult
2018-04-25BattlemaxxC-PRP
M1923263/6206510177464941510577 : F6556472F092AB84
PRP: Verified
PRP without proof (not generated)
2018-04-23ATHC-PRP
M1923263/6206510177464941510577 : F6556472F092AB84
PRP: Verified
PRP without proof (not generated)
2018-04-23bamF-ECM
Factor: 6206510177464941510577 / (ECM curve 2, B1=50000, B2=5000000)
2018-01-19mikrNF-PM1
B1=8000000, B2=320000000, E=12
2018-01-18JossNF-PM1
B1=1923263, B2=30000000, E=12
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-03ramgeisNF
no factor from 2^65 to 2^66
2015-06-27MadPooC-LL
51016DEDB9280CB2
2015-05-17snme2pm1NF
no factor from 2^64 to 2^65
2015-05-17snme2pm1NF
no factor from 2^63 to 2^64
2011-09-27kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2009-06-04Architects CubedNF
no factor from 2^60 to 2^61