4 526 243 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
9052487	7	23.1	old
325889497	9	28.3	2008-09-07 23:41:49
3338109462941881	16	51.6	2014-07-01 11:49:58
42389227140998568673	20	65.2	2018-07-24 11:22:04

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)	2017-11-16	Chang Chia-Tche	26A7FA427A8B18BC	3	2926169	5	3
Verified (Factored)	2018-01-01	kkmrkkblmbrbk	26A7FA427A8B18BC	3	1366897	5	3
Verified	2018-07-27	_p95holder_	26A7FA427A8B18BC	4	1245489	5	3

History

Date	User	Type	Result
2023-06-23	USAFSS	NF-PM1	B1=336000, B2=220317240
2018-07-27	_p95holder_	C-PRP	M4526243/9052487/325889497/3338109462941881/42389227140998568673 : 26A7FA427A8B18BC PRP: Verified PRP without proof (not generated)
2018-07-24	TJAOI	F	Factor: 42389227140998568673 / TF: 65-66
2018-01-01	kkmrkkblmbrbk	C-PRP	M4526243/9052487/325889497/3338109462941881 : 26A7FA427A8B18BC PRP: Verified PRP without proof (not generated)
2017-11-16	Chang Chia-Tche	C-PRP	M4526243/9052487/325889497/3338109462941881 : 26A7FA427A8B18BC PRP: Verified PRP without proof (not generated)
2014-07-01	TJAOI	F	Factor: 3338109462941881
2008-09-07	Will Edgington	F	Factor: 325889497