42 430 763 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 Lucas-Lehmer test

No factors below 2⁷⁴

TF target 2⁷²

P-1

B1 =	400000
B2 =	7200000

Status	Date	User	Residue	Shift	Software
Verified	2012-06-07	Dubslow	EE5374451B17959C	33659642	Linux 64-bit,Prime95,v27.7,build 2
Verified	2016-02-24	Koekie	EE5374451B17959C	2477872	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-05-28	Naegi Makoto	NF	no factor TF: 68-69
2022-04-10	TheJudger	NF	no factor TF: 73-74
2022-04-10	TheJudger	NF	no factor TF: 72-73
2016-02-24	Koekie	C-LL	EE5374451B17959C
2012-06-07	Dubslow	C-LL	EE5374451B17959C
2012-05-15	markr	NF-PM1	B1=400000, B2=7200000
2012-05-11	Jerry Hallett	NF	no factor TF: 69-72
2012-05-02	Architects Cubed	NF	no factor TF: 68-69
2007-06-15	Richard Kint	NF	no factor TF: 1-68