16 904 731 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 =	1700000
B2 =	4692388470

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-12-25	J. S. Waugh	E5CA89F6D71FF799	886115
Verified	2006-05-29	S448119	E5CA89F6D71FF799	14305039

History

Date	User	Type	Result
2024-09-06	Tha	NF-PM1	B1=1700000, B2=4692388470
2021-11-27	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-09-15	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-08-16	lycorn	NF	no factor from 2^70 to 2^71
2020-06-17	Tha	NF-PM1	B1=500000, B2=20000000, E=12
2020-05-16	lycorn	NF	no factor from 2^69 to 2^70
2018-03-26	ramgeis	NF	no factor from 2^67 to 2^69
2018-03-25	ramgeis	NF	no factor from 2^67 to 2^68
2014-09-21	Nesowa	NF	no factor from 2^66 to 2^67
2014-03-19	Nesowa	NF	no factor from 2^65 to 2^66