2 426 041 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
72781231	8	26.1	old
891361678632556121	18	59.6	2015-12-03 12:08:08
608850359813425965449	21	69.0	2018-07-20 12:47:52

ECM

Digits	B1	Curves
25	50000	66 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^65 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	alpertron	F9B0ED310D9CB8E2	2	0	1	3
Verified (Factored)	2017-11-03	Oliver Kruse	F9B0ED310D9CB8E2	2	517285	1	3
Verified	2018-07-23	_p95holder_	D43D04FEBC627CC4	3	2321730	5	3
Verified	2018-07-24	kkmrkkblmbrbk	D43D04FEBC627CC4	3	285048	5	3

P-1 factors

Date	Factor	B1	B2
2018-07-20	608850359813425965449	2000000	0

History

Date	User	Type	Result
2022-08-26	USAFSS	NF-PM1	B1=600000, B2=577075590
2018-07-24	kkmrkkblmbrbk	C-PRP	M2426041/72781231/891361678632556121/608850359813425965449 : D43D04FEBC627CC4 PRP: Verified PRP without proof (not generated)
2018-07-23	_p95holder_	C-PRP	M2426041/72781231/891361678632556121/608850359813425965449 : D43D04FEBC627CC4 PRP: Verified PRP without proof (not generated)
2018-07-20	alpertron	F-PM1	Factor: 608850359813425965449 / (P-1, B1=2000000)
2017-11-03	Oliver Kruse	C-PRP	M2426041/72781231/891361678632556121 : F9B0ED310D9CB8E2 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2426041/72781231/891361678632556121 : F9B0ED310D9CB8E2 PRP: Verified PRP without proof (not generated)
2015-12-03	TJAOI	F	Factor: 891361678632556121 / TF: 59-60