16 245 461 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 2⁷⁴

TF target 2⁶⁹

P-1

B1 =	694880
B2 =	714806820

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-08-31	Binary Digits	71E9A34A46810603	4967762
Verified	2004-04-20	Kostas G. Gavrielidis	71E9A34A46810603	9933068

History

Date	User	Type	Result
2024-06-09	chevron	NF-PM1	B1=694880, B2=714806820
2022-03-24	Mark Rose	NF	no factor from 2^73 to 2^74
2022-03-18	Markus K.	NF	no factor from 2^72 to 2^73
2021-09-25	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-08	SRBase	NF	no factor from 2^70 to 2^71
2021-04-27	lycorn	NF	no factor from 2^69 to 2^70
2018-02-25	ramgeis	NF	no factor from 2^68 to 2^69
2018-02-25	ramgeis	NF	no factor from 2^67 to 2^68
2014-08-08	Nesowa	NF	no factor from 2^66 to 2^67
2014-03-23	Nesowa	NF	no factor from 2^65 to 2^66