You could do those additional tests if the output were a character array by using Java BigInteger or Python.
give nth decimal place of pi
letter yes yes & letter no no
Back to basics 25 - Valid variable names
Permute diagonal and antidiagonal
List composite numbers that cannot be written as the sum of two primes
Identify primorial primes
Label primes with the Erdos-Selfridge classification
Count alternating permutations
Solve the Challenger puzzle
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