Base 66 has 20 possible final digits
At 1 digits, there were 18 primes, 0 leaders
At 2 digits, there were 165 primes, 0 leaders
At 3 digits, there were 986 primes, 6 leaders
At 4 digits, there were 4213 primes, 58 leaders
At 5 digits, there were 14475 primes, 569 leaders
At 6 digits, there were 40613 primes, 2810 leaders
At 7 digits, there were 97030 primes, 9905 leaders
At 8 digits, there were 201068 primes, 27037 leaders
At 9 digits, there were 369786 primes, 62184 leaders
At 10 digits, there were 608958 primes, 122959 leaders
At 11 digits, there were 909141 primes, 212778 leaders
At 12 digits, there were 1240886 primes, 327703 leaders
At 13 digits, there were 1560793 primes, 457217 leaders
At 14 digits, there were 1816526 primes, 580896 leaders
At 15 digits, there were 1972139 primes, 682166 leaders
At 16 digits, there were 1999328 primes, 738797 leaders
At 17 digits, there were 1908059 primes, 747394 leaders
At 18 digits, there were 1717789 primes, 708938 leaders
At 19 digits, there were 1463539 primes, 631965 leaders
At 20 digits, there were 1184882 primes, 533909 leaders
At 21 digits, there were 912674 primes, 427842 leaders
At 22 digits, there were 669678 primes, 324472 leaders
At 23 digits, there were 470060 primes, 235283 leaders
At 24 digits, there were 316334 primes, 163192 leaders
At 25 digits, there were 204205 primes, 108110 leaders
At 26 digits, there were 126088 primes, 68302 leaders
At 27 digits, there were 75392 primes, 41964 leaders
At 28 digits, there were 43045 primes, 24366 leaders
At 29 digits, there were 23882 primes, 13861 leaders
At 30 digits, there were 12738 primes, 7486 leaders
At 31 digits, there were 6626 primes, 3935 leaders
At 32 digits, there were 3376 primes, 2040 leaders
At 33 digits, there were 1646 primes, 1047 leaders
At 34 digits, there were 750 primes, 479 leaders
At 35 digits, there were 339 primes, 219 leaders
At 36 digits, there were 150 primes, 94 leaders
At 37 digits, there were 62 primes, 38 leaders
At 38 digits, there were 30 primes, 21 leaders
At 39 digits, there were 9 primes, 8 leaders
At 40 digits, there were 2 primes, 2 leaders
In total, in base 66 there were 19977480 primes and 7270052 leaders, maxlen=40