2 021 959 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
3288518161519	13	41.6	old
4008768821597125602103	22	71.8	2019-06-03 08:24:38
15630358600381362708841	23	73.7	2016-02-02 20:43:01

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	113 / 640

Estimated T-Level: 25.9 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-06	Oliver Kruse	1D76ED5945506D11	2	0	1	3
Verified (Factored)	2017-11-14	kkmrkkblmbrbk	1D76ED5945506D11	2	1365690	1	3
Verified	2019-06-05	vnatin	256FA58DF8F30CCC	3	1195265	5	3
Verified	2019-06-07	kracker	256FA58DF8F30CCC	3	1597085	5	3

P-1 factors

Date	Factor	B1	B2
2016-02-02	15630358600381362708841	500000	15000000

History

Date	User	Type	Result
2019-06-07	kracker	C-PRP	M2021959/3288518161519/15630358600381362708841/4008768821597125602103 : 256FA58DF8F30CCC PRP: Verified PRP without proof (not generated)
2019-06-05	vnatin	C-PRP	M2021959/3288518161519/15630358600381362708841/4008768821597125602103 : 256FA58DF8F30CCC PRP: Verified PRP without proof (not generated)
2019-06-03	_p95holder_	F-ECM	Factor: 4008768821597125602103 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-14	kkmrkkblmbrbk	C-PRP	M2021959/3288518161519/15630358600381362708841 : 1D76ED5945506D11 PRP: Verified PRP without proof (not generated)
2017-10-06	Oliver Kruse	C-PRP	M2021959/3288518161519/15630358600381362708841 : 1D76ED5945506D11 PRP: Verified PRP without proof (not generated)
2016-02-02	alpertron	F-PM1	Factor: 15630358600381362708841 / (P-1, B1=500000, B2=15000000, E=12)