4 615 283 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
258455849	9	27.9	old
3886068287	10	31.9	2008-09-07 23:42:25
2438033398372601	16	51.1	2014-06-18 11:26:16
42593978711152291001	20	65.2	2018-07-25 09:38:52

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-11-18	kkmrkkblmbrbk	5EE3491287507632	3	1860599	5	3
Verified (Factored)	2018-02-28	Oliver Kruse	5EE3491287507632	3	3549063	5	3
Verified	2018-07-30	_p95holder_	5EE3491287507632	4	1870365	5	3

History

Date	User	Type	Result
2023-07-26	USAFSS	NF-PM1	B1=240000, B2=91991760
2018-07-30	_p95holder_	C-PRP	M4615283/258455849/3886068287/2438033398372601/42593978711152291001 : 5EE3491287507632 PRP: Verified PRP without proof (not generated)
2018-07-25	TJAOI	F	Factor: 42593978711152291001 / TF: 65-66
2018-02-28	Oliver Kruse	C-PRP	M4615283/258455849/3886068287/2438033398372601 : 5EE3491287507632 PRP: Verified PRP without proof (not generated)
2017-11-18	kkmrkkblmbrbk	C-PRP	M4615283/258455849/3886068287/2438033398372601 : 5EE3491287507632 PRP: Verified PRP without proof (not generated)
2014-06-18	TJAOI	F	Factor: 2438033398372601
2008-09-07	Will Edgington	F	Factor: 3886068287