7 987 897 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 2⁶⁷

P-1

B1 =	3000000
B2 =	8070112050

ECM

Digits	B1	Curves
25	50000	6 / 280

Estimated T-Level: 20.1 ⓘ

Status	Date	User	Residue	Shift
Verified	1999-08-31	Sergei Agalakov	CB7F39D613F70C66	832379
Bad	2002-09-14	Forrest Carpenter	2429D089EBF28D27	3502456
Verified	2003-03-16	Daniel Swanson	CB7F39D613F70C66	6784902

History

Date	User	Type	Result
2023-08-01	Tha	NF-PM1	B1=3000000, B2=8070112050
2016-04-12	mikr	NF-PM1	B1=5000000, B2=125000000, E=12
2013-07-25	Never Odd Or Even	NF	no factor from 2^72 to 2^73
2013-07-25	Never Odd Or Even	NF	no factor from 2^71 to 2^72
2013-03-16	Never Odd Or Even	NF	no factor from 2^70 to 2^71
2013-03-16	Never Odd Or Even	NF	no factor from 2^69 to 2^70
2013-03-16	Never Odd Or Even	NF	no factor from 2^68 to 2^69
2012-08-05	Squeeky_Squirrel	NF-PM1	B1=155000, B2=3371250, E=6
2012-08-05	Squeeky_Squirrel	NF-PM1	B1=65000, B2=861250, E=6
2012-03-20	Never Odd Or Even	NF	no factor from 2^67 to 2^68
2012-03-20	Never Odd Or Even	NF	no factor from 2^66 to 2^67
2012-02-22	Never Odd Or Even	NF	no factor from 2^65 to 2^66
2012-02-22	Never Odd Or Even	NF	no factor from 2^64 to 2^65
2012-02-22	Never Odd Or Even	NF	no factor from 2^63 to 2^64