Known PAPs -- Prime Arithmetic Progressions length first differance last other info 12 23143 30030 353473 G 1958 12 110437 13860 262897 s K 1967 13 4943 60060 725663 S 1963 14 31385539 420420 36850999 s P 1983 15 115453391 4144140 173471351 s P 1983 16 53298929 9699690 198794279 s W 1976 16 2236133941 223092870 5582526991 R 1969 17 3430751869 87297210 4827507229 s W 1977 18 2518035911 7536659130 130641241121 P 18 4808316343 717777060 17010526363 s P 18 51565746467 13889956080 287694999827 P 18 64158606367 2735312580 110658920227 18 98488875263 5169934770 186377766353 P 18 107928278317 9922782870 276615587107 P Nov 1982 18 115936060313 3103900800 168702373913 18 170263333103 5063238180 256338382163 19 8297644387 4180566390 83547839407 s P May 1984 19 16336945861 44298484230 813709662001 F May 1987 19 244290205469 13608665070 489246176729 F Mar 1987 20 68469367129 47780672940 976302152989 + P Apr 1992 20 109405841773 287925597960 5579992203013 + P Feb 1992 20 110560156867 1033366173840 19744517459827 - P 1990 20 214861583621 18846497670 572945039351 + s Y & F Sep 1987 20 416687284037 616405599810 12128393680427 - P 1990 20 474054896773 61311740490 1638977966083 + P Jan 1992 20 803467381001 2007835830 841616261771 + F Mar 1987 20 882050255881 102089237250 2821745763631 + P Apr 1992 20 1140997291211 7643355720 1286221049891 +- P 1990 20 1329325133639 274462428240 6544111270199 + P Jan 1992 20 1361328929537 189250651590 4957091309747 + P Mar 1992 20 1845449006227 1140004565700 23505535754527 F Mar 1987 20 2364458499701 112351509270 4499137175831 + P Mar 1992 20 2750642120531 45229654470 3610005555461 + P Mar 1992 20 2773814832407 1503451950 2802380419457 + P Mar 1992 20 2887486016777 362302820880 9771239613497 - P 1990 20 3313355036261 105513227820 5318106364841 + P Apr 1992 20 3362427181159 57771353640 4460082900319 + P Nov 1991 20 3548877561617 214838433810 7630807804007 +- P 1990 20 3774669829057 31087506450 4365332451607 + P Mar 1992 20 4251333799021 75977671770 5694909562651 + P Apr 1992 20 4252782701327 23958234300 4707989153027 + P Jan 1992 20 4621081644437 132497765400 7138539187037 + P Mar 1992 20 5191221651703 97045398450 7035084222253 - P 1990 20 5340154784021 841506305640 21328774591181 - P 1990 20 6202774455641 25878772920 6694471141121 +- P 1990 20 6958054860193 19486677210 7328301727183 + P Jan 1992 20 7241570717737 930297267900 24917218807837 - P 1990 20 7462540985803 28400692320 8002154139883 + P Mar 1992 20 7498293330161 30059339310 8069420777051 + P Feb 1992 20 7627596741461 841729398510 23620455313151 - P 1990 20 11276493292151 452878526100 19881185288051 - P 1990 20 12117311759647 308091253470 17971045575577 - P 1990 20 12403408638469 378142414650 19588114516819 - P 1990 20 13864765181923 190967496720 17493147619603 - P 1990 20 13879005786967 567102075540 24653945222227 - P 1990 20 13957225029919 335085490740 20323849353979 - P 1990 20 17973886276667 378365507520 25162830919547 - P 1990 20 20780211154739 407367580620 28520195186519 - P 1990 20 24845147147111 19855265430 25222397190281 - P 1990 21 142072321123 1419763024680 28537332814723 - P 1990 21 2930617401661 285801365850 8646644718661 + P Jan 1992 21 5749146449311 26004868890 6269243827111 + s P Mar 1992 21 14676404481107 2232044164350 59317287768107 * P Jan 1993 21 28383220937263 1861263814410 65608497225463 * P Nov 1992 22 11410337850553 4609098694200 108201410428753 * P Mar 1993 22 376859931192959 18549279769020 766394806342379 M 19 Apr 2003 s = smallest last term for that lenght * = GU Search (1992-3) + = GU Search (1991-2) - = UQ Search (1990) P = Paul Pritchard, Y = Jeff Young, F = James Fry, W = S.Weintraub, G = A.V.Golubev, K = E.Karst, S = V.N.Seredinskij, R = S.C.Root M = Markus Frind