The 1st RPS-Drive

This page is a Summary of the 1st Team Drive from Riesel Prime Search.

The goal of this drive was to search for primes of the form k·2n-1 for 16 high weighted k's.

Basic information:

StatusThe drive is over!
Started2005-10-31
Ended2006-08-02 (addition 2007-07-09)
Range n201.7k < n < 400k (addition 200k < n < 201.7k)
Contributors sieveL.Soule, A.de Pereyra, P.Minovic
Sieve depth
(history)
upto p = 2.6 T (2.6·1012)
201.7k-220k 600 bn
220k-225k 700 bn
225k-240k 803 bn
240k-250k 1250 bn
250k-250.5k 1400 bn
250.5k-260k 1500 bn
260k-270k 1800 bn
270k-280k 2150 bn
280k-290k 2450 bn
290k-300k 2554 bn
300k-400k 2600 bn
(add. 200k-201.7k 26.4 bn)
Contributors LLR
(primes found)
J.C.Brunson(3), J.Rosink, C.Vonck(1), D.Stones(2), E.Rajh(10), C.Chatfield(2), D.Gribenko(1),
T.Galvan(2), J.Schlesser(1), (Joshua2), K.Bonath(1), P.Minovic(26), L.Soule(46), M.E.Haas(2),
A.de Pereyra(5), I.Goudt(1), M.Curtis
Candidates for LLR423257 (201.7k-400k) + 4306 (add. 200k-201.7k)
Primes found103 new
LinkRPS-Forum

Data table:

kNash
weight
# candidates
(additional)
# primesprime for n
67342275535624086 (239)5223322, 347511, 353411, 364695, 395172
460735275608628114 (288)4203335, 214002, 222828, 364244
663301485544125349 (245)5219504, 283108, 310281, 327696, 334362
697942245566326056 (269)6200875*, 203135, 227785, 322681, 327686, 378553
779602395551125476 (260)7270175, 274412, 324527, 333493, 334489, 374864, 380120
804003525610027762 (272)7214262, 216915, 266132, 332603, 336113, 342906, 368847
870667875648129138 (313)9206753, 212653, 227223, 267981, 272449, 272494, 276165, 278560, 280741
918332415614227779 (292)9214043, 239792, 248917, 262673, 272910, 282017, 294041, 301645, 364130
1325978745536725166 (257)4207546, 231853, 240347, 368910
1626176475555724970 (255)3238545, 261194, 346364
1694614845573225506 (267)8210675, 233653, 253946, 276735, 287699, 305693, 315949, 344338
1738812075558725499 (267)6208659, 270036, 272308, 295976, 338289, 369523
1952775825649329067 (307)6221012, 223100, 224003, 351809, 366939, 381015
2022381375563925698 (249)9211753, 218104, 232878, 244893, 262241, 273167, 293727, 315661, 343804
3276742755560025731 (244)7248386, 253106, 260185, 273507, 289153, 321975, 340049
3467560635593227860 (282)8274439, 283353, 306548, 314870, 332529, 339001, 370425, 387681

* = additional prime found by K.Bonath, who extended the search range for n_min from 201700 downto 200000 in July 2007.

Detailed range overview:

To be done.