238 081 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
18570319	8	24.1	old
9255323603529598128966079	25	82.9	2020-05-26 20:44:29

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	479 / 640

Estimated T-Level: 28.7 ⓘ

TF below 2^90 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-22	Oliver Kruse	BE9124D273093EDA	1	0	1	3
Verified (Factored)	2017-10-12	kkmrkkblmbrbk	BE9124D273093EDA	1	171153	1	3
Verified (Factored)	2020-04-17	Oliver Kruse	0F07C403DCB42E1C	1	16936	5	3
Verified	2020-05-26	M Miller	0F07C403DCB42E1C	2	15155	5	3

History

Date	User	Type	Result
2022-04-03	Oliver Kruse	NF-PM1	B1=30000000, B2=10120247026890
2021-07-14	Oliver Kruse	NF-PM1	B1=30000000, B2=3000000000, E=24
2020-05-26	M Miller	C-PRP	M238081/18570319/9255323603529598128966079 : 0F07C403DCB42E1C PRP: Verified PRP without proof (small exponent)
2020-05-26	nordi	F-ECM	Factor: 9255323603529598128966079 / (ECM curve 1, B1=250000, B2=25000000, Sigma=5018754817652486)
2020-04-17	Oliver Kruse	C-PRP	M238081/18570319 : 0F07C403DCB42E1C PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M238081/18570319 : BE9124D273093EDA PRP: Verified PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M238081/18570319 : BE9124D273093EDA PRP: Verified PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M238081/18570319 : BE9124D273093EDA PRP without proof (not generated)