Periods of decimal representations of reciprocals of prime numbers? How to compute them for very large primes?
50247
Compute the period of a decimal number a priori
92737
primes whose difference is a multiple of $n$
25428
Prime numbers of the form $ n^{34} -9$
79343
How to compute the nth root of a very big integer
103323
Finding a primitive root of a prime number
45456
Do the digits of $\pi$ contain every possible finite-length digit sequence?
96846
Decimal representation begins with $N$
42754
Modular arithmetic: division, fractions, solving linear congruences
67526
Double series over primes
5142
Infinitely many primes of the form $pn+1$
149381
Relating the base-p periodic expansion of a rational to its p-adic representation
22441
Does the sum of reciprocals of primes converge?
7452
Splitting of primes in the compositum of fields
78259
Prime factorization
143392
How to calculate the division and remainder of a big number manually
25181
Simple numerical methods for calculating the digits of $\pi$
90009
Detecting that a fraction is a repeating decimal