Subject: Date: 4 Dec 1997 08:33:10 -0000 From: yamasaki@kusm.kyoto-u.ac.jp To: kc2h-msm@asahi-net.or.jp Factors of N# - 1 N!, or N factorial, may be defined as the product of all integers between 1 and N inclusive. N#, or N primorial, is defined as the product of all primes up to and including N. Easy proofs of the infinity of primes arise from considering the possible factors of N# +/-1 and N! +/- 1. In the table below, Pxxx denotes a prime of xxx decimal digits and Cyyy a composite of yyy decimal digits. This table was begun by George Sassoon, geosas@aol.com, who discovered most of the factors below. Other folk who deserve credit are Vivian Stevens (viv@ictus.demon.co.uk), Sam Wagstaff (ssw@cs.purdue.edu) and Paul Leyland (pcl@oucs.ox.ac.uk). N Factors of N# - 1 2 1 3 5 5 29 7 11.19 11 2309 13 30029 17 61.8369 19 53.197.929 23 37.131.46027 29 79.81894851 31 228737.876817 37 229.541.1549.38669 41 304250263527209 43 141269.92608862041 47 191.53835557.59799107 53 87337.326257.1143707681 59 27600124633.69664915493 61 1193.85738903.1146665184811 67 163.2682037.17975352936245519 71 260681003321.2140320249725509 73 313.130126775077472920609013813 79 163.2843.154050371.45072420668688011 83 139.26417.72730720785932715377476303 89 P35 97 66683.34575048572282567142346657278943 101 2990092035859.77877992237653703381046191 103 15649.142067.4599659.2345476528134511293575297 107 17515703.21871237.2463838256443.2718987378107653 109 719.2963.33637693242743.3903552776732446839822199 113 295201.567840892706882863.188573541523110659271203 127 15098753.53836523233421347.4938679937132087522704219 131 10172884549.141929971892850488111.364235297758479811711 137 20962699238647.245652323403761.13991128678227301652750227 139 4871.20988504343363646127926611.97957120305761011573774669 149 673.448045542064369.4948626474214096948642213863754187837657 151 311.409.24083.73553706686333095518730694000692449365670934668377 157 1409.212909.41204155505831.2861886907783199742338113523322848541079 163 1291.2565890287.5869655087.296557694065995104962797259705798672615771 167 331.443.2324921219.9966924050498910251857.283401055985955918267159853871 173 1450184819.70130101304951.1638026247818646257156883948600783993669082361 179 23497.10508085821.31376977774573.962389165640406763213. P22 181 711427.38746702321.1231393632556286622892198907. P30 191 521.483209.1581363911.15414974591. P48 193 673.65473937.566471804985844321. P49 197 519577.13170522280541.10639208937288223. P45 199 1372062943.4784328604523758357.619780408302187874237918207. P28 211 56543.110654059.70587793986617. P58 223 811. P84 227 182309.75057984242015536975478208351523. P52 229 53077.5497565129461239035650709608982319328127. P47 233 641. P91 239 349.9491.39993893. P82 241 389.89644308483145450484697016758269. P64 251 565921.91679677.15700021586055397160311310308325895690972977. P44 257 777041. P98 263 1176221.841626607.6174446933. P81 269 757.142771.12318911453427703. P84 271 2341.4261.27922541.42697366619.3881590179124452191153083.20996638941932036180486431. P36 277 44753.248161.786431. P98 281 303665792864057405074693.117277141037621524016699418297213730021625341. P48 283 7027.12575441052481. P101 293 4111.166748157677124857.1217670675652709713577568997. P73 307 1571.1847. C117 311 166661291.4886278425797257511145616469. P90 313 917337320621.11992468992157. P103 317 P131 331 7037216702504839. C117 337 P136 347 1609. C135 349 33409. C136 353 18422659.41160337.183289461261013.216281814742687. P100 359 1069.227252621.3220975490939318218453.50469098962422028923887. P90 367 1880785297.14117210027.3570547671926024135523469081. P102 373 2705777831.2849239123772750489371. C120 379 6361.14215086019.62792061476751488746157.195266286094155838540091.149039245305638880318701790537479430494077. P53 383 5407.46274172247987.389804042062703.30384465170048145022609. P102 389 104707.104718299011.213872651865626627. C126 397 599.132169. P154 401 4139.3035507.580921563293. P142 409 35447.1046871190981073158010761424147857. P129 419 1986323.7107593640109421533. C144 421 761.192699873029.8881908402042853. P142 431 234277373353.178545722262071151482152751. P137 433 1447641166619113176017. C156 439 33073. P175 443 16054891. C175 449 1594387.6566983041745360901. C160 457 4012079.90710124413.563246585673404032021. P150 461 C191 463 631.647.31536908305027.434131516805761. P159 467 11379319098532079. C180 479 2609.4481.10627. C187 487 494441.18299730308381. C182 491 17929.40163137549.205335958836311.779980872607823. P160 499 569.9806549. C197