9 203 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 3 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
13225504887593	14	43.6	old
177628183517206467565073	24	77.2	old
16123257397803240272638801	26	83.7	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	6116 / 16550

Estimated T-Level: 46.8 ⓘ

TF below 2^151 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	8136398D902019B1	3	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	8136398D902019B1	3	0	1	3
Verified	2017-12-07	ATH	8136398D902019B1	3	8382	1	3
Verified	2020-04-17	Oliver Kruse	2D4371DB0FE351EB	3	4457	5	3
Verified	2024-07-01	kkmrkkblmbrbk	2D4371DB0FE351EB	3	7161	5	3

History

Date	User	Type	Result
2024-07-01	kkmrkkblmbrbk	C-PRP	M9203/13225504887593/16123257397803240272638801/177628183517206467565073 : 2D4371DB0FE351EB PRP: Verified PRP without proof (small exponent)
2023-07-11	JacobZ	NF-PM1	B1=63000000000, B2=255469764292442700
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M9203/13225504887593/177628183517206467565073/16123257397803240272638801 : 2D4371DB0FE351EB PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M9203/13225504887593/177628183517206467565073/16123257397803240272638801 : 8136398D902019B1 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M9203/13225504887593/177628183517206467565073/16123257397803240272638801 : 8136398D902019B1 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9203/known_factors : 8136398D902019B1 PRP without proof (not generated)