2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, 97, 101, 107, 113, 131, 149, 151, 157, 167, 179, 181, 191, 199, 311, 313, 337, 347, 353, 359, 373, 383, 389, 701, 709, 727, 733, 739, 743, 751, 757, 761, 769, 787, 797, 907, 919, 929, 937, 941, 953, 967, 971, 983, 991, 1009, 1021,...
2 -> 1st ... 3 -> 2nd ... 5 -> 3rd ... 7 -> 4th ... 11 -> 5th ... 13 -> 6th ... 17 -> 7th ...
19 -> 8th ... 23 -> 9th ... 29 -> 10th ... 31 -> 11th ... 37 -> 12th ... 41 -> 13th ... 43 -> 14th 47 -> 15th ... 53 -> 16th ... 59 -> 17th ... 61 -> 18th ... 67 -> 19th ... 71 -> 20th ...
73 -> 21st ... 79 -> 22nd ... 83 -> 23th ... 89 -> 24th... 97 -> 25th ...
Notice: 37 is the 12th and 73 is the 21st: 37 -> 12 and 73 -> 21 (= 7*3). That's cool!
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