19 805 039 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 =	810000
B2 =	460182660

Status	Date	User	Residue	Shift
Verified	2004-02-23	Marc Honey	9907357CFE507175	8692355
Verified	2007-12-31	Tore Kolltveit	9907357CFE507175	9358580

History

Date	User	Type	Result
2024-12-26	MooMoo2	NF-PM1	B1=810000, B2=460182660
2023-04-11	Sid & Andy	NF	no factor from 2^72 to 2^73
2020-10-04	-Anonymous-	NF	no factor from 2^71 to 2^72
2020-10-03	-Anonymous-	NF	no factor from 2^70 to 2^71
2019-12-02	James Heinrich	NF-PM1	B1=405000, B2=8606250, E=12
2019-11-10	lycorn	NF	no factor from 2^69 to 2^70
2017-11-26	ramgeis	NF	no factor from 2^68 to 2^69
2013-08-14	Nesowa	NF	no factor from 2^67 to 2^68
2013-08-14	Nesowa	NF	no factor from 2^66 to 2^67