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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Exponent Range:










MnStatusDetails
121997Factored
FactorDigitsBitsDate
2154383364782110451594172477.52015-02-13 11:23:00
215322258810466155777238771032994.12008-12-21 04:58:30
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000223 / 1566
Estimated T-Level: 30.7 ⓘ
TF below 2^97 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Unknown52D30
Verified (Factored)Jay R. Hill2519F39621A1D2D30
Verified (Factored)Brian J. Beesley2519F39621A1D2D30
Verified (Factored)Eivind Triel2519F39621A1D2D336404
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver Kruse594C00D0CBCB416A2013
Verified2017-10-09Chang Chia-Tche594C00D0CBCB416A2013
Verified2017-10-13kkmrkkblmbrbk594C00D0CBCB416A25797713
Verified2020-04-17Oliver KruseB238F73EADEA510927084453
Verified2024-02-03Wentao HuangB238F73EADEA510921359753
History
DateUserTypeResult
2024-02-03Jon PaceCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M121997/21532225881046615577723877103/215438336478211045159417 : B238F73EADEA5109
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M121997/215438336478211045159417/21532225881046615577723877103 : B238F73EADEA5109
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M121997/215438336478211045159417/21532225881046615577723877103 : 594C00D0CBCB416A
PRP: Verified
PRP without proof (not generated)
2017-10-09Chang Chia-TcheC-PRP
M121997/known_factors : 594C00D0CBCB416A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M121997/21532225881046615577723877103/215438336478211045159417 : 594C00D0CBCB416A
PRP without proof (not generated)
2017-02-23kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2015-02-13TJAOIF-ECM
Factor: 215438336478211045159417
2008-12-21axnF-ECM
Factor: 21532225881046615577723877103