449 287 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
157070919407671	15	47.2	old
279004044512660526018403700239	30	97.8	2020-07-15 05:20:03

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	328 / 640

Estimated T-Level: 27.6 ⓘ

TF below 2^87 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-24	Oliver Kruse	EC12325577A92BAB	1	0	1	3
Verified (Factored)	2017-09-27	Oliver Kruse	EC12325577A92BAB	1	0	1	3
Verified (Factored)	2017-11-07	kkmrkkblmbrbk	EC12325577A92BAB	1	409890	1	3
Verified (Factored)	2020-04-18	Oliver Kruse	E6EDF343E7BC96D2	1	157200	5	3
Verified	2020-07-17	Kirill Frolov	E6EDF343E7BC96D2	2	415935	5	3
Verified	2020-07-17	Klaus Nordmann	E6EDF343E7BC96D2	2	12098	5	3

History

Date	User	Type	Result
2020-07-17	Klaus Nordmann	C-PRP	M449287/157070919407671/279004044512660526018403700239 : E6EDF343E7BC96D2 PRP: Verified PRP without proof (small exponent)
2020-07-17	Kirill Frolov	C-PRP	M449287/157070919407671/279004044512660526018403700239 : E6EDF343E7BC96D2 PRP: Verified PRP without proof (small exponent)
2020-07-15	nordi	F-ECM	Factor: 279004044512660526018403700239 / (ECM curve 128, B1=250000, B2=25000000, Sigma=8900876644079726)
2020-04-18	Oliver Kruse	C-PRP	M449287/157070919407671 : E6EDF343E7BC96D2 PRP: Verified PRP without proof (small exponent)
2017-11-07	kkmrkkblmbrbk	C-PRP	M449287/157070919407671 : EC12325577A92BAB PRP: Verified PRP without proof (small exponent)
2017-09-27	Oliver Kruse	C-PRP	M449287/157070919407671 : EC12325577A92BAB PRP: Verified PRP without proof (not generated)
2017-09-24	Oliver Kruse	C-PRP	M449287/157070919407671 : EC12325577A92BAB PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=3000000, B2=100000000, E=12