2 387 117 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
129775621562985119	18	56.8	old
448813797637021153	18	58.6	2015-09-21 11:26:07
122240220817536598459848704642371409	36	116.6	2018-05-31 11:47:46

ECM

Digits	B1	Curves
25	50000	69 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^66 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	B998DB62C7574982	2	0	1	3
Verified (Factored)	2017-11-02	Oliver Kruse	B998DB62C7574982	2	1270619	1	3
Verified	2018-06-04	_p95holder_	10564AEA68C0320A	3	1033543	5	3
Verified	2018-06-07	Battlemaxx	10564AEA68C0320A	3	739050	5	3

P-1 factors

Date	Factor	B1	B2
2018-05-31	122240220817536598459848704642371409	2000000	60000000

History

Date	User	Type	Result
2018-06-07	Battlemaxx	C-PRP	M2387117/129775621562985119/448813797637021153/122240220817536598459848704642371409 : 10564AEA68C0320A PRP: Verified PRP without proof (not generated)
2018-06-04	_p95holder_	C-PRP	M2387117/129775621562985119/448813797637021153/122240220817536598459848704642371409 : 10564AEA68C0320A PRP: Verified PRP without proof (not generated)
2018-05-31	alpertron	F-PM1	Factor: 122240220817536598459848704642371409 / (P-1, B1=2000000, B2=60000000, E=12)
2017-11-02	Oliver Kruse	C-PRP	M2387117/129775621562985119/448813797637021153 : B998DB62C7574982 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2387117/129775621562985119/448813797637021153 : B998DB62C7574982 PRP: Verified PRP without proof (not generated)
2015-09-21	TJAOI	F	Factor: 448813797637021153 / TF: 58-59