2, 6, 7, 11, 26, 31, 37, 41, 61, 126, 131, 161, 217, 221, 241, 341, 626, 631, 661, 841, 1297, 1301, 1321, 1421, 1921, 3126, 3131, 3161, 3341, 4421, 7777, 7781, 7801, 7901, 8401, 10901, 15626, 15631, 15661, 15841, 16921, 23401, 46657, 46661, 46681, 46781, 47281