16 326 319 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 =	1000000
B2 =	487402410

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2003-03-27	David Metcalfe	692EB9D414841098	11033336
Verified	2006-08-14	David Motsinger	692EB9D414841098	5523694

History

Date	User	Type	Result
2023-06-07	Sid & Andy	NF	no factor from 2^72 to 2^73
2022-03-15	masser	NF-PM1	B1=1000000, B2=487402410
2021-09-19	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-09	SRBase	NF	no factor from 2^70 to 2^71
2021-02-04	seatsea	NF	no factor from 2^69 to 2^70
2019-11-13	James Heinrich	NF-PM1	B1=320000, B2=6240000, E=12
2018-02-18	ramgeis	NF	no factor from 2^68 to 2^69
2018-02-18	ramgeis	NF	no factor from 2^67 to 2^68
2016-03-16	Mark Rose	NF	no factor from 2^65 to 2^66
2014-08-18	Nesowa	NF	no factor from 2^66 to 2^67