搜索一个号码
弗里德曼。  半素数

属于这两组的第一个数字:

25,121,289,1255,1285,2501,2507,2509,3281,4106,6145,6455,10201,11663,11665,12091,12106,12769,12955,13813,13822,13823,14129,14647,15567,15586,15613,15623,15627,15634,15689,15697,16295,16347,16382,16387,16743,16783,17482,19321,19653,19693,21953,22757,24385,25105,25895,27889,29517,29519,29549,29929,32761,32762,32765,32815,32845,32849,32854,32855,32885,34991,34993,35726,35782,35942,37187,37249,38427,39283,39362,39363,43689,44977,45363,45367,45947,45957,46613,46615,46637,46642,46651,46653,46661,46673,46677,48758,48759,52483,52493,52498,53297,54953,54958,58973,59039,59054,59057,59129,59759,62503,64522,65483,65489,65491,65531,65542,67234,69253,69985,74183,74533,75433,77459,78123,78133,83957,87382,91853,97333,97343,98305,98435,100255,101299,102783,104366,104897,104969,104978,105295,106289,107329,109351,109353,109355,109358,112505,114647,114697,116317,116342,116635,116729,116837,117067,117466,117574,117578,117587,117597,117613,117627,117637,117641,117647,117651,117653,117655,117661,117662,117677,117685,117695,117697,117739,117767,117785,118567,123199,123897,124385,124483,124585,124609,124851,124973,125002,125007,125009,125011,125014,125033,125039,125041,125043,125047,125051,125057,125059,125061,125065,125066,125071,125078,125087,125089,125098,125099,125317,125943,126559,126563,126737,127417,127454,128633,129595,129603,129647,130294,130679,131073,132493,132497,132565,132567,132653,132659,133594,134455,134457,134459,134462,134465,134549,134689,134783,136079,137257,137281,137497,137539,137635,137638,137642,137679,137719,137729,137749,137759,137779,137782,137789,137794,137797,137798,137859,137879,137893,137899,138235,139129,139677,142735,142795,143857,144527,145117,145273,146137,146293,146337,146378,146411,146413,146473,146689,146758,147349,147383,147439,147469,147491,147493,147905,148223,149782,151447

一些较大的示例: