89 500 841 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	860000
B2 =	19135000

Status	Date	User	Residue	Shift	Software
Unverified	2016-10-10	Klaus Vicaro	C54B51B51D40BD__	39515150	Windows 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2017-07-24	monst	NF	no factor TF: 75-76
2017-07-24	monst	NF	no factor TF: 74-75
2017-07-24	monst	NF	no factor TF: 73-74
2016-10-10	Klaus Vicaro	C-LL	C54B51B51D40BD__
2016-10-10	Klaus Vicaro	NF-PM1	B1=860000, B2=19135000
2013-04-11	tomfr	NF	no factor TF: 72-73
2013-04-11	tomfr	NF	no factor TF: 71-72
2013-04-11	tomfr	NF	no factor TF: 70-71
2013-04-11	tomfr	NF	no factor TF: 69-70
2013-04-11	tomfr	NF	no factor TF: 68-69
2013-04-11	tomfr	NF	no factor TF: 67-68
2013-04-11	tomfr	NF	no factor TF: 66-67
2013-03-21	frmar	NF	no factor TF: 65-66
2010-11-10	Architects Cubed	NF	no factor TF: 64-65