2 153 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
66074717928721	14	45.9	old
282281048995390294591321	24	77.9	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	60054 / 105362

Estimated T-Level: 57.8 ⓘ

TF below 2^187 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	249316A42BFCE95F	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	249316A42BFCE95F	2	1345	1	3
Verified	2020-04-17	Oliver Kruse	B5CE3988B0BBB0F2	2	1422	5	3
Verified	2024-01-27	Wentao Huang	B5CE3988B0BBB0F2	2	776	5	3

History

Date	User	Type	Result
2024-04-29	masser	NF-PM1	B1=100000000000, B2=275604102122349000
2024-01-27	Wentao Huang	C-PRP	M2153/66074717928721/282281048995390294591321 : B5CE3988B0BBB0F2 PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M2153/66074717928721/282281048995390294591321 : B5CE3988B0BBB0F2 PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M2153/66074717928721/282281048995390294591321 : 249316A42BFCE95F PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M2153/66074717928721/282281048995390294591321 : 249316A42BFCE95F PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M2153/66074717928721/282281048995390294591321 : 249316A42BFCE95F PRP without proof (not generated)
2016-09-08	kkmrkkblmbrbk	NF-PM1	B1=500000000, B2=50000000000, E=12