Matevž Markovič: > "If k^4 is a palindrome > 0, then k begins and ends with digit 1, > all other > digits of k being 0." > > Simmons verified it up to 10^14 I hope you realize that Gustavus Simmons verified it only for k^4 < 2.8 * 10^14. In other words, for k < 4091.