332 328 551 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with PRP test

No factors below 2⁸¹

TF target 2⁸¹

P-1

B1 =	1900000
B2 =	80000000

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	Certified Good Power=11	2025-11-15	Matthew Buckingham-Bishop	5BAE74BCC4DFE63C	0	1	3

History

Date	User	Type	Result
2025-11-15	prose	CERT	Proof certified good
2025-11-15	Matthew Buckingham-Bishop	C-PRP	Proof Certified Good Proof Power: 11
2024-02-21	Grant McCracken	NF	no factor TF: 68-69
2023-10-18	James Heinrich	NF	no factor TF: 67-68
2021-06-24	Kriesel	NF-PM1	B1=1900000, B2=80000000
2021-06-24	Kriesel	NF	no factor TF: 80-81
2021-06-24	Kriesel	NF	no factor TF: 79-80
2021-06-24	Kriesel	NF	no factor TF: 78-79
2021-05-24	Jon Pace	NF	no factor TF: 77-78
2021-05-24	Jon Pace	NF	no factor TF: 76-77
2016-04-12	Team_Inspector	NF	no factor TF: 75-76
2014-04-20	Preben S	NF	no factor TF: 74-75
2014-01-01	Team_Inspector	NF	no factor TF: 73-74
2013-01-18	LaurV	NF	no factor TF: 72-73
2012-06-20	Grant McCracken	NF	no factor TF: 71-72
2011-04-25	Grant McCracken	NF	no factor TF: 70-71
2010-12-17	Sunfish	NF	no factor TF: 69-70
2010-04-01	Grant McCracken	NF	no factor TF: 68-69