28 409 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
909089	6	19.8	old
132600469588498919984130147144103	33	106.7	2018-02-13 18:37:36

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 (Factored)	2017-09-21	Oliver Kruse	21BA922BD99A3CB1	1	0	1	3
Verified (Factored)	2017-10-12	kkmrkkblmbrbk	21BA922BD99A3CB1	1	13075	1	3
Verified	2018-02-15	Oliver Kruse	94375CEC983AC89A	2	8551	5	3
Verified	2018-02-17	Chang Chia-Tche	94375CEC983AC89A	2	1332	5	3

History

Date	User	Type	Result
2023-02-18	nordi	NF-PM1	B1=3000000000, B2=925584566816910
2022-10-11	nordi	NF-PM1	B1=3000000000
2018-02-17	Chang Chia-Tche	C-PRP	M28409/909089/132600469588498919984130147144103 : 94375CEC983AC89A PRP: Verified PRP without proof (small exponent)
2018-02-15	Oliver Kruse	C-PRP	M28409/909089/132600469588498919984130147144103 : 94375CEC983AC89A PRP: Verified PRP without proof (small exponent)
2018-02-13	nordi	F-ECM	Factor: 132600469588498919984130147144103 / (ECM curve 144, B1=3000000, B2=300000000)
2017-10-12	kkmrkkblmbrbk	C-PRP	M28409/909089 : 21BA922BD99A3CB1 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M28409/909089 : 21BA922BD99A3CB1 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M28409/909089 : 21BA922BD99A3CB1 PRP without proof (not generated)
2016-12-28	kkmrkkblmbrbk	NF-PM1	B1=500000000, B2=10000000000, E=12