11, 13,31, 17, 71. 19, 91, 37,73, 79,97, 101, 103,301, 107, 701, 109,901, 113,311, 117,711, 119,911, 127,721, 131, 133, 331, 137, 731, 141,
143,341, 147, 741, 149, 941, 151, 157. 751, 161, 163,361, 167,761, 169,961, 171, 173,371, 177, 771, 179,971, 181, 183, 381, 187, 781, 191
193,391, 197.791 199, 991
It appears that all primes reverse to forma aprime UNLESS th 1st digit of the prime is even. EX --- 41 is prime but 14 is not
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1200 = 5 x 5 x 3 x 2 x 2 x 2 x 2
2 3 5 7 11 13 17 31 37 71 73 79 97
there are 13 primes not 5.
25 primes.
Yes, there are an infinite number of twin primes.