1 995 649 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
155660623	9	27.2	old
18266226066310561	17	54.0	2014-10-28 12:07:31
1474722977837833709423	22	70.3	2021-03-19 20:25:14

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	58 / 640

Estimated T-Level: 25.5 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-02	alpertron	28C09A23AD1D43A2	2	0	1	3
Verified (Factored)	2017-10-20	Oliver Kruse	28C09A23AD1D43A2	2	1915387	1	3
Verified	2021-03-19	ATH	C185ACC8C943CDCA	3	1527707	5	3

History

Date	User	Type	Result
2022-08-15	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-03-19	curtisc	CERT	PRP Certification Proof certified good
2021-03-19	ATH	C-PRP	M1995649/155660623/18266226066310561/1474722977837833709423 : C185ACC8C943CDCA PRP proof power = 7 PRP: Verified Proof certified good
2021-03-19	_p95holder_	F-ECM	Factor: 1474722977837833709423 / (ECM curve 7, B1=50000, B2=5000000)
2017-10-20	Oliver Kruse	C-PRP	M1995649/155660623/18266226066310561 : 28C09A23AD1D43A2 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-02	alpertron	C-PRP	M1995649/155660623/18266226066310561 : 28C09A23AD1D43A2 PRP: Verified (Factored) PRP without proof (not generated)
2014-10-28	TJAOI	F	Factor: 18266226066310561 / TF: 54-55