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接头n。  双素数

属于这两组的第一个数字:

101,103,107,109,311,313,521,1607,1609,1619,1621,2027,2111,2113,2309,2311,2711,2713,3821,3823,4019,4021,4517,4519,4721,4723,5009,5011,5417,5419,7211,7213,9011,9013,9419,9421,9629,9631,10007,10009,11117,11119,11717,11719,12611,12613,12821,12823,13711,13721,13723,14009,14011,14627,16829,16831,17027,17029,17921,17923,20021,20023,20507,20509,20717,20719,21011,21013,21017,21611,21613,22109,22111,23627,24107,24109,24917,24919,25411,26111,26113,26729,26731,28111,29021,29023,30011,30013,31121,31319,31321,31511,31513,31721,31723,31727,32411,32413,32611,34211,34213,35729,35731,36011,36013,37021,41411,41413,41611,42017,42019,44027,44029,45821,45823,47417,47419,48119,48121,48731,48733,50021,50023,51719,51721,53717,53719,54011,54013,54419,54421,54629,54631,55931,55933,57329,57331,57527,57529,58229,58231,60917,60919,62927,62929,63419,63421,64919,64921,67217,67219,67427,67429,69029,69827,69829,70619,70621,71327,72221,72223,72227,76421,76423,76829,76831,81017,81019,82529,82531,82721,82723,82727,82729,83219,83221,84317,84319,84521,84523,85427,85429,85619,85621,85829,85831,86027,86029,86531,86533,86927,86929,87221,87223,87629,87631,90017,90019,90617,90619,90821,90823,91127,92219,92221,96221,96223,96823,98639,99131,99133,99527,99529,101111,101113,101117,101119,102407,102409,105527,106217,106219,106619,106621,107717,107719,108011,108013,109517,109519,110321,110921,110923,111827,112919,112921,113621,113623,115019,115021,116927,116929,117617,117619,119417,119419,121019,121021,122207,122209,122611,124427,125117,125119,125927,125929,126011,126013,126227,127031,127033,128831,128833,129119,129121,129527,129529,131009,131011,132527,134921,134923,135017,135019,135211,140417,140419,140627,141511,143111.

一些较大的示例: