属于这两组的第一个数字：
三,7,13,23,31,43,47,73,83,113,167,233,283,293,313,317,337,353,383,443,467,523,547,643,647,683,743,773,797,823,883,953,983,997,1283,1373,1613,2113,2383,2393,2399,2939,3137,3347,3373,3547,3617,3643,3673,3739,3797,3823,3853,3947,3967,4373,4397,4523,4643,4937,5197,5443,5653,5743,5939,5953,6173,6397,6883,6983,7193,7333,7643,7673,7853,7883,7937,8317,8467,8647,9137,9283,9467,9743,12113,12347,13313,13967,15443,15683,16673,16883,18353,18443,21283,21523,21613,23339,24337,24373,26113,27283,29137,31193,31223,33547,33797,33967,34283,34337,36353,36653,36947,37339,37853,42467,42797,43613,45197,45953,46337,46997,48353,49613,51613,54547,59399,61613,63313,63467,63617,63823,64283,64937,66173,66653,67547,67853,69467,72383,72617,72953,73331,73613,73643,73823,75683,75743,76883,78167,78317,79283,79337,79613,81283,81373,83137,84523,84673,84967,86113,86353,87523,87643,89137,91373,91823,92383,92467,92647,92683,94547,95443,96337,96353,96823,97523,97883,121997,132647,133967,139397,162683,181283,184523,192347,192383,196337,213613,233993,236947,239933,242797,267523,272383,273643,275167,276673,276883,279337,291373,291997,296353,318443,327673,336373,336653,336997,343313,345953,346337,357283,361223,366173,367547,367853,367883,373393,378167,378317,378467,381223,381373,391823,396353,396997,399137,421997,424967,427283,427883,433967,454547,466373,492467,492647,513313,516883,537547,537853,542467,542797,543313,563467,564373,564937,566947,567883,576883,578317,579283,579613,593993,597523,597673,612113,616547,616673,627673,632647,633967,642683,642953,661613,663823,666173,667883,672953,673613,673643,675347,675743,687523,691997,692467,693967,697523,721997,724967,727673. 一些较大的示例：
95766373,95792383,95979283,96273643,96396997,96399137,96463823,96597673,96915683,96962617,97236947,97861613,98427283,98672953,98676883,98966653,99336373,99961613,99962683,99979337.