13 770 481 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 =	1600000
B2 =	1620978450

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2003-02-16	Dave Stephens	97C9ADA0CB303F80	12830288
Verified	2005-03-20	Pat MacDonald	97C9ADA0CB303F80	8057777

History

Date	User	Type	Result
2023-10-28	Sid & Andy	NF	no factor from 2^72 to 2^73
2023-01-08	nordi	NF-PM1	B1=1600000, B2=1620978450
2022-12-18	nordi	NF-PM1	B1=1600000
2021-09-20	RichD0	NF	no factor from 2^71 to 2^72
2021-09-04	SRBase	NF	no factor from 2^70 to 2^71
2021-08-08	SRBase	NF	no factor from 2^69 to 2^70
2018-01-29	ramgeis	NF	no factor from 2^68 to 2^69
2017-12-23	-Anonymous-	NF	no factor from 2^67 to 2^68
2015-08-19	Nesowa	NF	no factor from 2^66 to 2^67
2014-07-02	Nesowa	NF	no factor from 2^65 to 2^66