# [05AB1E], 15 bytes 0-indexed. 11Iµ11N*DÂQNp*½ [Try it online!] [05AB1E]: https://github.com/Adriandmen/05AB1E [Try it online!]: https://tio.run/nexus/05ab1e#@29o6Hloq6Ghn5bL4aZAvwKtQ3v//zcyBQA "05AB1E – TIO Nexus" **Explanation** 11 # initialize stack with 11 Iµ # loop over N until counter equals input 11N* # multiply N by 11 D # duplicate ÂQ # check if the copy equals its reverse Np # check if N is prime * # multiply the results of the checks together ½ # if 1, increase counter