1 320 353 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
280284534841	12	38.0	old
126859590768645439	18	56.8	2015-01-21 21:11:15
22742212180530823763807	23	74.3	2018-06-01 11:34:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 640

Estimated T-Level: 25.8 ⓘ

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)	2017-09-30	Oliver Kruse	A377447A1DFB3043	2	0	1	3
Verified (Factored)	2017-10-23	kkmrkkblmbrbk	A377447A1DFB3043	2	86920	1	3
Verified	2018-06-03	ANONYMOUS	F59FADABF4FB1CB1	3	750503	5	3
Verified	2018-06-07	_p95holder_	F59FADABF4FB1CB1	3	632419	5	3

P-1 factors

Date	Factor	B1	B2
2015-01-21	126859590768645439	500000	15000000

History

Date	User	Type	Result
2018-06-07	_p95holder_	C-PRP	M1320353/280284534841/126859590768645439/22742212180530823763807 : F59FADABF4FB1CB1 PRP: Verified PRP without proof (not generated)
2018-06-03	ANONYMOUS	C-PRP	M1320353/280284534841/126859590768645439/22742212180530823763807 : F59FADABF4FB1CB1 PRP: Verified PRP without proof (not generated)
2018-06-01	TJAOI	F-ECM	Factor: 22742212180530823763807 / (ECM curve 50, B1=50000, B2=5000000)
2017-10-23	kkmrkkblmbrbk	C-PRP	M1320353/280284534841/126859590768645439 : A377447A1DFB3043 PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1320353/280284534841/126859590768645439 : A377447A1DFB3043 PRP: Verified PRP without proof (not generated)
2015-01-21	alpertron	F-PM1	Factor: 126859590768645439 / (P-1, B1=500000, B2=15000000, E=12)