15 754 709 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 =	1380694770

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-07-20	Tim Korb	6DCBF7810510B4ED	287424
Verified	2006-03-01	Marc Honey	6DCBF7810510B4ED	5720601

History

Date	User	Type	Result
2024-08-16	Sid & Andy	NF-PM1	B1=1500000, B2=1380694770
2021-06-22	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-06-20	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-06-20	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-05-24	lycorn	NF	no factor from 2^69 to 2^70
2018-03-13	ramgeis	NF	no factor from 2^68 to 2^69
2018-03-13	ramgeis	NF	no factor from 2^67 to 2^68
2016-03-16	Mark Rose	NF	no factor from 2^65 to 2^66
2015-11-30	Tha	NF-PM1	B1=300000, B2=6000000, E=12
2014-07-10	Nesowa	NF	no factor from 2^66 to 2^67