连续奇数组成的素数
从1开始连续奇数写成一个十进制数字如果是素数则得到结果
比如20内的
135791113151719
就是个素数 length==2:
13
length==10:
135791113151719
length==16:
135791113151719212325272931
length==34:
135791113151719212325272931333537394143454749515355575961636567
length==49:
135791113151719212325272931333537394143454749515355575961636567697173757779818385878991939597 https://oeis.org/A048847
页:
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