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
1511Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
3023411.6old
38283300411031.8old
1396977445168105911857.0old
276169762895636844923308221046214875937121.1old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
65800000000156492 / 194238
Estimated T-Level: 64.0
TF below 2^208 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse4076E3BDA8B4D4A34013
Verified2017-10-02kkmrkkblmbrbk4076E3BDA8B4D4A34013
Verified2017-12-07ATH4076E3BDA8B4D4A3466313
Verified2020-04-17Oliver Kruse8172D0158D1FF7184132653
Verified2020-08-12_p95holder_8172D0158D1FF718469653
Verified (Factored)2022-05-12Jorge Coveiro8172D0158D1FF718177853
History
DateUserTypeResult
2022-05-12Jorge CoveiroC-PRP
M1511/3023 : 8172D0158D1FF718
PRP: Verified (Factored)
PRP without proof (small exponent)
2021-07-21ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2021-03-27nordiNF-PM1
B1=1000000000000, B2=2232843418649129478
2020-08-12_p95holder_C-PRP
M1511/3023/3828330041/139697744516810591/2761697628956368449233082210462148759 : 8172D0158D1FF718
PRP: Verified (Factored)
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1511/3023/3828330041/139697744516810591/2761697628956368449233082210462148759 : 8172D0158D1FF718
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M1511/3023/3828330041/139697744516810591/2761697628956368449233082210462148759 : 4076E3BDA8B4D4A3
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M1511/3023/3828330041/139697744516810591/2761697628956368449233082210462148759 : 4076E3BDA8B4D4A3
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1511/known_factors : 4076E3BDA8B4D4A3
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=1000000000, B2=100000000000, E=12