1 864 739 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
865238897	9	29.7	old
782521855299947974696932851410613860657	39	129.2	2015-07-19 06:15:50

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-05	Oliver Kruse	29AC41C76D948240	2	0	1	3
Verified	2017-11-11	kkmrkkblmbrbk	29AC41C76D948240	2	1582274	1	3

P-1 factors

Date	Factor	B1	B2
2015-07-19	782521855299947974696932851410613860657	500000	15000000

History

Date	User	Type	Result
2021-08-05	ViliamF	NF-PM1	B1=5000000, B2=470000000
2017-11-11	kkmrkkblmbrbk	C-PRP	M1864739/865238897/782521855299947974696932851410613860657 : 29AC41C76D948240 PRP: Verified PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1864739/865238897/782521855299947974696932851410613860657 : 29AC41C76D948240 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1864739/865238897/782521855299947974696932851410613860657 : 29AC41C76D948240 PRP without proof (not generated)
2015-07-19	alpertron	F-PM1	Factor: 782521855299947974696932851410613860657 / (P-1, B1=500000, B2=15000000, E=12)