Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
280759Factored
FactorDigitsBitsDate
2807591721.4old
761004793841211446.12014-02-05 16:28:18
20602895991850876311960.82014-08-28 10:11:04
4273266476436891132720657361594855427338125.02016-11-03 18:26:57
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000187 / 1566
Estimated T-Level: 30.6 ⓘ
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver KruseB3889D70C68AB5004013
Verified2017-10-12Oliver KruseB3889D70C68AB50046912713
Verified2017-11-06kkmrkkblmbrbkB3889D70C68AB50043124813
Unverified (Reliable)2020-04-17Oliver Kruse49764BE012E483__410617553
P-1 factors
DateFactorB1B2
2016-11-034273266476436891132720657361594855427350000000
History
DateUserTypeResult
2023-03-19Naegi MakotoNF-PM1
B1=6500000, B2=213166573620
2020-04-17Oliver KruseC-PRP
M280759/2807591/76100479384121/2060289599185087631/42732664764368911327206573615948554273 : 49764BE012E483__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M280759/2807591/76100479384121/2060289599185087631/42732664764368911327206573615948554273 : B3889D70C68AB500
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M280759/2807591/76100479384121/2060289599185087631/42732664764368911327206573615948554273 : B3889D70C68AB500
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M280759/known_factors : B3889D70C68AB500
PRP without proof (not generated)
2016-11-03kkmrkkblmbrbkF-PM1
Factor: 42732664764368911327206573615948554273 / (P-1, B1=5000000)
2014-08-28TJAOIF-ECM
Factor: 2060289599185087631
2014-02-05TJAOIF
Factor: 76100479384121