1 996 303 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
233232072097	12	37.8	old
38695020478748233	17	55.1	2015-01-05 12:34:30
5862974155086904849337	22	72.3	2021-03-22 01:06:26

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	60 / 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)	2017-10-05	Oliver Kruse	10A6B32E33D106A2	2	0	1	3
Verified (Factored)	2017-11-13	Chang Chia-Tche	10A6B32E33D106A2	2	391865	1	3
Verified	2021-03-22	MarkS	08A8DB5C8D8D4F2D	3	1719816	5	3
Verified	2021-03-22	MarkS	08A8DB5C8D8D4F2D	3	705210	5	3

History

Date	User	Type	Result
2022-08-15	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-03-22	Schnell Lab	CERT	PRP Certification Proof certified good
2021-03-22	MarkS	C-PRP	M1996303/233232072097/38695020478748233/5862974155086904849337 : 08A8DB5C8D8D4F2D PRP proof power = 7 PRP: Verified Proof certified good
2021-03-22	curtisc	CERT	PRP Certification Proof certified good
2021-03-22	MarkS	C-PRP	M1996303/233232072097/38695020478748233/5862974155086904849337 : 08A8DB5C8D8D4F2D PRP proof power = 7 PRP: Verified Proof certified good
2021-03-22	MarkS	F-ECM	Factor: 5862974155086904849337 / (ECM curve 5, B1=50000, B2=5000000, Sigma=3392413478057796)
2017-11-13	Chang Chia-Tche	C-PRP	M1996303/233232072097/38695020478748233 : 10A6B32E33D106A2 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1996303/233232072097/38695020478748233 : 10A6B32E33D106A2 PRP: Verified (Factored) PRP without proof (not generated)
2015-01-05	TJAOI	F	Factor: 38695020478748233 / TF: 55-56