42 303 071 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 =	710000
B2 =	710000

Status	Date	User	Residue	Shift	Software
Verified	2012-04-24	kdgehman	944F2628FBBBE986	36503490	Windows 64-bit,Prime95,v27.3,build 1
Verified	2012-04-26	Dubslow	944F2628FBBBE986	309532	Linux 64-bit,Prime95,v27.6,build 1

History

Date	User	Type	Result
2020-01-05	-anonymous-	NF	no factor TF: 73-74
2018-08-10	-anonymous-	NF	no factor TF: 72-73
2012-04-26	Dubslow	C-LL	944F2628FBBBE986
2012-04-24	kdgehman	NF	no factor TF: 71-72
2012-04-24	kdgehman	NF	no factor TF: 70-71
2012-04-24	kdgehman	NF	no factor TF: 69-70
2012-04-24	kdgehman	NF	no factor TF: 68-69
2012-04-24	kdgehman	C-LL	944F2628FBBBE986
2011-06-03	556guy	NF-PM1	B1=710000
2007-07-04	-anonymous-	NF	no factor TF: 1-68