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
1481
Composite, with 6 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
71089516.1old
39152782331031.9old
127877069137431443.5old
39934195803761293030103292581.7old
826813887008018951187597609003410533737122.6old
834898187026072978675800881750666089928193523146152.52011-12-13 19:36:06
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000098820 / 105362
Estimated T-Level: 59.7 ⓘ
TF below 2^193 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 Kruse8148B4A073E5917F6013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbk8148B4A073E5917F6013
Verified
No proof (small exponent)
2017-12-07ATH8148B4A073E5917F6119413
Verified
No proof (small exponent)
2020-04-17Oliver KruseE381D48E7D74287D699753
Verified
No proof (small exponent)
2020-08-12_p95holder_E381D48E7D74287D676453
History
DateUserTypeResult
2021-07-20ViliamFNF-PP1Start=2/7, B1=1000000000, B2=221000000000
2021-03-27nordiNF-PM1B1=1000000000000, B2=2232843418649129478
2020-08-12_p95holder_C-PRPM1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : E381D48E7D74287D
2020-04-17Oliver KruseC-PRPM1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : E381D48E7D74287D
2017-12-07ATHC-PRPM1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : 8148B4A073E5917F
2017-10-02kkmrkkblmbrbkC-PRPM1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : 8148B4A073E5917F
2017-09-21Oliver KruseC-PRPM1481/known_factors : 8148B4A073E5917F
2016-09-07kkmrkkblmbrbkNF-PM1B1=1000000000, B2=100000000000, E=12
2011-12-13Michael KennF-ECMFactor: 8348981870260729786758008817506660899281935231