9 209 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
1821133994357721169773431211508950567060217	43	140.4	2009-01-25 15:06:16

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	7110 / 9201

Estimated T-Level: 43.9 ⓘ

TF below 2^141 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Unknown	7B5E	0
Verified (Factored)		George Woltman	8504B2CCF5047B5E	0
Verified (Factored)		Brian J. Beesley	8504B2CCF5047B5E	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	9A607B8572CC677B	1	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	9A607B8572CC677B	1	0	1	3
Verified	2017-12-07	ATH	9A607B8572CC677B	1	5949	1	3
Unverified	2020-04-17	Oliver Kruse	92303B83BBD874__	1	6348	5	3

History

Date	User	Type	Result
2023-07-11	JacobZ	NF-PM1	B1=63000000000, B2=255469764292442700
2020-04-17	Oliver Kruse	C-PRP	M9209/1821133994357721169773431211508950567060217 : 92303B83BBD874__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M9209/1821133994357721169773431211508950567060217 : 9A607B8572CC677B PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M9209/1821133994357721169773431211508950567060217 : 9A607B8572CC677B PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9209/known_factors : 9A607B8572CC677B PRP without proof (not generated)
2009-01-25	-Anonymous-	F-ECM	Factor: 1821133994357721169773431211508950567060217