10 101 239 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 2⁶⁸

P-1

B1 =	2000000
B2 =	2599084950

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

Status	Date	User	Residue	Shift
Verified	2000-11-15	K.C. Budd	A85202C7BFEA736F	9381031
Verified	2003-12-23	Jay Babcock	A85202C7BFEA736F	8098074

History

Date	User	Type	Result
2024-01-02	Sid & Andy	NF-PM1	B1=2000000, B2=2599084950
2021-05-05	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-05-03	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-05-03	-Anonymous-	NF	no factor from 2^70 to 2^71
2020-11-04	Dylan Delgado	NF-PM1	B1=400000, B2=11000000, e=12
2015-09-08	ramgeis	NF	no factor from 2^69 to 2^70
2015-09-08	ramgeis	NF	no factor from 2^68 to 2^69
2015-09-08	ramgeis	NF	no factor from 2^67 to 2^68
2014-10-09	BloodIce	NF	no factor from 2^66 to 2^67
2014-10-09	BloodIce	NF	no factor from 2^65 to 2^66
2011-09-13	David Campeau	NF	no factor from 2^64 to 2^65