number-theory

number-theory

How to solve the error ' [not a vector ]'

Question about properties of modulo inverse

How to efficiently calculate a^k mod m

Modular arithmetic. How to solve the following equation?

Minimal positive integer n which is divisible by d and has sum of digits equal to s

Given a*b, c*d , how can I prove a+b>c+d(fact)?

Fastest way to find all the divisors of a large number

Code that maps numbers from one number to another with where each number has a distance greater than 1

Sum of proper divisor upto N

Euler's Totient function permutation

How to compute the remainder of a very large number (string with 1 mi digits) in the division by 1500

Number of coprime pairs in a given segment

_REQUEST only returning the first letter of input

Project Euler #402

Number of different solutions of xy+yz+ xz = N

How to find total number of divisors upto N?

Calculating sum of geometric series (mod m)

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