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
245261Factored
FactorDigitsBitsDate
48561679825.5old
76521433826.22008-07-21 09:14:51
32845411110129401962772525935246333108.02022-02-20 03:47:58
ECM
DigitsB1Curves
2550000280 / 280
30250000625 / 640
Estimated T-Level: 29.9
TF below 2^94 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse0BB93D257100E7482013
Verified (Factored)2017-10-12kkmrkkblmbrbk0BB93D257100E748214701513
Verified (Factored)2020-04-17Oliver Kruse46260E5EA6C107FA21203953
Verified2022-02-20zr_zircon46260E5EA6C107FA322214053
History
DateUserTypeResult
2022-04-12Oliver KruseNF-PM1
B1=30000000, B2=10120247026890
2022-02-20Brent GoebelCERT
PRP Certification
Proof certified good
2022-02-20zr_zirconC-PRP
M245261/48561679/76521433/328454111101294019627725259352463 : 46260E5EA6C107FA
PRP proof power = 5
PRP: Verified
Proof certified good
2022-02-20CoreyF-ECM
Factor: 328454111101294019627725259352463 / (ECM curve 4, B1=250000, B2=25000000, Sigma=4337141788341671)
2021-07-28Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M245261/48561679/76521433 : 46260E5EA6C107FA
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M245261/48561679/76521433 : 0BB93D257100E748
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M245261/48561679/76521433 : 0BB93D257100E748
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M245261/48561679/76521433 : 0BB93D257100E748
PRP without proof (not generated)
2008-07-21J FeitsmaF
Factor: 76521433