Base 14 all exponents <= 104 is complete to at least size 102, cofactor 97. Highlights:

All even exponents have terminated.

Merges as previously posted:

14^7, 14^13, and 14^31

Odd exponent terminations as previously posted:

14^5, 14^9, 14^19, 14^21, 14^23, 14^25, 14^35, 14^37, 14^45

Additional termination:

14^57 terminates at term 664 with P=1429 after reaching 80 digits.

The base is released.

This was a prolific base. 64 / 104 exponents terminated = 61.5%. It is the 2nd best base > 2 so far searched. Stats:

Base 28: 51 / 82 = 62.2%

Base 14: 64 / 104 = 61.5%

Base 11: 68 / 115 = 59.1%

Base 14 just missed 1st place when 14^91 starting at 105 digits dropped all the way to 17 digits before returning to its original height. Perhaps bases divisible by 7 or 14 have naturally more terminations than the others.