1 438 729 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
126662087072753	15	46.8	old
289289072804057	15	48.0	2008-08-26 20:19:11
4736631713687183633	19	62.0	2015-02-26 11:47:55
27886452973606735731959	23	74.6	2015-02-26 11:47:55

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 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	F866016418872074	4	0	1	3
Verified	2017-10-27	kkmrkkblmbrbk	F866016418872074	4	731717	1	3

P-1 factors

Date	Factor	B1	B2
2015-02-26	27886452973606735731959	500000	15000000
2015-02-26	4736631713687183633	500000	15000000

History

Date	User	Type	Result
2017-10-27	kkmrkkblmbrbk	C-PRP	M1438729/126662087072753/289289072804057/27886452973606735731959/4736631713687183633 : F866016418872074 PRP: Verified PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1438729/126662087072753/289289072804057/27886452973606735731959/4736631713687183633 : F866016418872074 PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1438729/126662087072753/289289072804057/27886452973606735731959/4736631713687183633 : F866016418872074 PRP without proof (not generated)
2015-02-26	alpertron	F-PM1	Factor: 132087857537031930524293996789325499827047 / (P-1, B1=500000, B2=15000000, E=12)
2008-08-26	-Anonymous-	F	Factor: 289289072804057