, the largest known emirp is 1010006+941992101×104999+1, found by Jens Kruse Andersen in October 2007.
Prva arpštevila so :: 13, 17, 31, 37, 71, 73, 79, 97, 107, 113, 149, 157, ...Vsa nepalindromna permutirajoča praštevila, so arpštevila.