2N-1 Cunningham numbers (Lehigh local)

Curve counts in the t50 column of the original mersenne.org file may be replaced by:

t50 COMPLETE.

This Lehigh local version focuses on likely candidates for post-t50 curves:

the first holes and the largest cofactors (above 233-digits decimal).

(Format adapted from Garo tables on mersenneforum.)

Mersenne Numbers (2N-1), no known factors

Digits in factor505560
Bound #144,000,000110M260M (use GMP-ECM)
Curves to test1930046000lots
1061DoneDonea few

Mersenne Numbers (2N-1), some known factors (focus: large SNFS candidates)

Digits in factor50Digits1st digits
Bound #144,000,000of comp. of composite
Curves to test19300cofactorcofactor
827Dne+ 172 19554296919
853Done
8575800 255 14014323378
859Done
863Done 234 25030167043
877Dne+
887Done
899Done
913Done
9195567 261 13207328563
9233 240 35324045265
9295547 219 (up) 10249763180
935Done
9375647 221 (up) 17081079393
9415510 280 24688154278
947Done
953Done
959Done
9613 254 32339159589
973Done
985Done
9911850 264 26509301895
1007103 254 42215615995
1009Done
1013256 288 20198906214
1019100 246 44323533148
1027Done
10311055 299 25611528652
10371003 289 48726941814
10433 243 20802114160
1051603 310 67482054469
1061 (above) Done 320 24707306311
10673 260 30422060356
10694780 306 36181037329
10733 281 31032069586
1079Done
10813 251 43256444045
1087Done
10935 294 51145723534
1105Done
11095 301 26235893929
1111503 278 11706163682
11153 268 10651099418
1117100 332 33204935897
11237400 321 14658952057
11273 279 14070506943
1129 327 25821185510
1133Done 235 15640130251
1135Done
11393 313 27781907360
11473 263 48943760685
1149Done
11514996242 51300791318
1153 331 53963193785
1157Done
1159400309 62085268286
1161Done
1163 318 43816812048
1167Done
1171Dne*2 342 20879213751
1175Done
11773 306 27459735369
118110291 17618553360
11831053261 43843420361
1187500 266 53458596961
1191Done
11933990 355 11054539166
11993 314 15507653258

prime95 Factors found (selected)


M971 has a factor: 23917104973173909566916321016011885041962486321502513*,**
M997 has a factor: 167560816514084819488737767976263150405095191554732902607*,**
* indicates first known factor.
** indicates factorization of the number is now complete.

Last Mersenne.org update: April 11, 2007