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

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MnStatusDetails
440389Factored
FactorDigitsBitsDate
5780541438461119563179692478.92014-11-22 00:32:01
22398837393651904867510632580.92010-03-03 18:03:29
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski184C0
Verified (Factored)Klaus KastensDD9AB7AD069E584C0
Verified (Factored)Michael J. KilfoyleDD9AB7AD069E584C0
Verified (Factored)Eivind TrielDD9AB7AD069E584C270480
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-24Oliver KruseCBB1B643F8B0A6E72013
Verified2017-10-13Oliver KruseCBB1B643F8B0A6E7224677513
Verified2017-12-16ATHCBB1B643F8B0A6E7240290313
Unverified (Reliable)2020-04-18Oliver KruseE595D3B8B1F972__234186553
P-1 factors
DateFactorB1B2
2014-11-225780541438461119563179693000000100000000
History
DateUserTypeResult
2020-04-18Oliver KruseC-PRP
M440389/578054143846111956317969/2239883739365190486751063 : E595D3B8B1F972__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-16ATHC-PRP
M440389/578054143846111956317969/2239883739365190486751063 : CBB1B643F8B0A6E7
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M440389/2239883739365190486751063/578054143846111956317969 : CBB1B643F8B0A6E7
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M440389/2239883739365190486751063/578054143846111956317969 : CBB1B643F8B0A6E7
PRP without proof (not generated)
2014-11-22alpertronF-PM1
Factor: 578054143846111956317969 / (P-1, B1=3000000, B2=100000000, E=12)
2010-03-03Sturle SundeF-ECM
Factor: 2239883739365190486751063
2009-08-27Carsten KossendeyNF-PM1
B1=440389