4 915 037 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
258537427364389681	18	57.8	old
139390893604153135081	21	66.9	2019-08-05 18:31:46

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

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)	2017-09-20	kkmrkkblmbrbk	D47BB56843E581F1	1	0	1	3
Verified (Factored)	2018-04-07	ATH	D47BB56843E581F1	1	3156763	1	3
Verified	2019-08-06	Niels_Mache_Nextcloud	630969E8FD249E19	2	3487456	5	3
Verified	2019-08-08	arnaud	630969E8FD249E19	2	2559575	5	3

History

Date	User	Type	Result
2023-09-14	USAFSS	NF-PM1	B1=256000, B2=105522060
2019-08-08	arnaud	C-PRP	M4915037/258537427364389681/139390893604153135081 : 630969E8FD249E19 PRP: Verified PRP without proof (not generated)
2019-08-06	Niels_Mache_Nextcloud	C-PRP	M4915037/258537427364389681/139390893604153135081 : 630969E8FD249E19 PRP: Verified PRP without proof (not generated)
2019-08-05	MarkS	F-ECM	Factor: 139390893604153135081 / (ECM curve 2, B1=50000, B2=5000000)
2018-04-07	ATH	C-PRP	M4915037/258537427364389681 : D47BB56843E581F1 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4915037/258537427364389681 : D47BB56843E581F1 PRP: Verified PRP without proof (not generated)