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:





MnDetails
12421
Composite, with 7 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
74527516.2old
53559353825.72008-08-26 19:58:36
904186957331531446.42008-08-26 19:58:36
7885799109549974811859.52008-08-26 19:58:36
604906320998011710905264412685.62008-10-16 23:57:25
715372773710815409737740716755131102.52008-10-25 20:59:11
1053661094030774218455274186068176337805339944142.92010-03-05 21:47:03
P-1 factors
DateFactorsB1B2
2022-05-13No new factors discovered10000000000001000381676319425408
2021-03-01No new factors discovered60000060000000
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000008526 / 9201
Estimated T-Level: 44.6
TF below 2^143 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver KruseFE3B260707E697B27013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbkFE3B260707E697B27013
Verified
No proof (small exponent)
2017-12-07ATHFE3B260707E697B271082713
Verified
No proof (small exponent)
2020-04-17Oliver KruseCADC35FCE6BD27047294253
Verified
No proof (small exponent)
2024-07-01kkmrkkblmbrbkCADC35FCE6BD27047703353
History
DateUserTypeResult
2025-03-05masserNF-PP1Start=196/23, B1=430000000, B2=429570000000
2025-02-20masserNF-PP1Start=6/5, B1=430000000, B2=429570000000
2025-01-19masserNF-PP1Start=2/7, B1=430000000, B2=429570000000
2024-07-01kkmrkkblmbrbkC-PRPM12421/10536610940307742184552741860681763378053399/53559353/60490632099801171090526441/7153727737108154097377407167551/74527/788579910954997481/90418695733153 : CADC35FCE6BD2704
2022-05-13-anonymous-F-PM1Factor: 10536610940307742184552741860681763378053399 / B1=1000000000000, B2=1000381676319425400
2021-08-27Seth_TrNF-PM1B1=400000000
2021-03-01gLaussF-PM1Factor: 646830731619399318987822579528145963056518303 / B1=600000, B2=60000000
2021-03-01gLaussNF-PM1B1=60000, B2=6000000
2020-04-17Oliver KruseC-PRPM12421/74527/53559353/90418695733153/788579910954997481/60490632099801171090526441/7153727737108154097377407167551/10536610940307742184552741860681763378053399 : CADC35FCE6BD2704
2017-12-07ATHC-PRPM12421/74527/53559353/90418695733153/788579910954997481/60490632099801171090526441/7153727737108154097377407167551/10536610940307742184552741860681763378053399 : FE3B260707E697B2
2017-10-02kkmrkkblmbrbkC-PRPM12421/74527/53559353/90418695733153/788579910954997481/60490632099801171090526441/7153727737108154097377407167551/10536610940307742184552741860681763378053399 : FE3B260707E697B2
2017-09-21Oliver KruseC-PRPM12421/74527/53559353/90418695733153/788579910954997481/60490632099801171090526441/7153727737108154097377407167551/10536610940307742184552741860681763378053399 : FE3B260707E697B2
2017-09-21Oliver KruseC-PRPM12421/74527/53559353/90418695733153/788579910954997481/60490632099801171090526441/7153727737108154097377407167551/10536610940307742184552741860681763378053399 : FE3B260707E697B2
2016-09-09kkmrkkblmbrbkNF-PM1B1=100000000, B2=10000000000, E=12
2011-04-14Never Odd Or EvenF-PM1Factor: 360916884476328813539580743
2011-04-14Never Odd Or EvenF-PM1Factor: 360916884476328813539580743
2010-07-20Never Odd Or EvenFFactor: 6738634136904693631
2010-07-20Never Odd Or EvenF-PM1Factor: 284611804622498488436711384810691433361108383
2010-07-20Never Odd Or EvenF-PM1Factor: 360916884476328813539580743
2010-03-17Never Odd Or EvenF-PM1Factor: 90418695733153
2010-03-05Never Odd Or EvenF-ECMFactor: 10536610940307742184552741860681763378053399
2008-10-25Will EdgingtonF-ECMFactor: 7153727737108154097377407167551
2008-10-16-anonymous-F-ECMFactor: 60490632099801171090526441
2008-08-26-anonymous-F-ECMFactor: 788579910954997481
2008-08-26-anonymous-F-PM1Factor: 90418695733153
2008-08-26-anonymous-FFactor: 53559353