13 896 341 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷³

TF target 2⁶⁹

P-1

B1 =	1500000
B2 =	4677773100

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-01-15	Marek Rydz	F84259757A812B92	7225968
Verified	2005-11-27	Ars Technica Team Prime Rib	F84259757A812B92	4564950

History

Date	User	Type	Result
2023-10-02	Sid & Andy	NF	no factor from 2^72 to 2^73
2022-02-22	Luminescence	NF-PM1	B1=1500000, B2=4677773100
2021-10-24	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-05	SRBase	NF	no factor from 2^70 to 2^71
2021-08-09	SRBase	NF	no factor from 2^69 to 2^70
2018-01-14	ramgeis	NF	no factor from 2^68 to 2^69
2017-12-23	-Anonymous-	NF	no factor from 2^67 to 2^68
2016-09-09	Tha	NF-PM1	B1=300000, B2=6000000, E=12
2015-09-07	Nesowa	NF	no factor from 2^66 to 2^67
2014-07-08	Nesowa	NF	no factor from 2^65 to 2^66