28 429 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
1223044950568481	16	50.1	old
10884458649339538001	20	63.2	2008-08-26 19:59:19

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	661 / 4588

Estimated T-Level: 35.7 ⓘ

TF below 2^114 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	C6B7ABEECA9053CA	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	C6B7ABEECA9053CA	2	3936	1	3
Unverified	2020-04-17	Oliver Kruse	2A8F69AD8420DC__	2	19451	5	3

History

Date	User	Type	Result
2023-02-18	nordi	NF-PM1	B1=3000000000, B2=925584566816910
2022-10-13	nordi	NF-PM1	B1=3000000000
2020-04-17	Oliver Kruse	C-PRP	M28429/1223044950568481/10884458649339538001 : 2A8F69AD8420DC__ PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M28429/1223044950568481/10884458649339538001 : C6B7ABEECA9053CA PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M28429/1223044950568481/10884458649339538001 : C6B7ABEECA9053CA PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M28429/1223044950568481/10884458649339538001 : C6B7ABEECA9053CA PRP without proof (not generated)
2016-12-28	kkmrkkblmbrbk	NF-PM1	B1=500000000, B2=10000000000, E=12
2008-08-26	-Anonymous-	F-ECM	Factor: 10884458649339538001