Aliquot sequences - amicable numbers - continued fraction of a square root - Collatz conjecture - prime numbers in a given range - prime deserts - diophantine equations - divisors (also number and sum) - Fibonacci numbers - Goldbach conjecture - least quadratic non residue and least primitive root of a prime number - modpow (a^b mod. c) - nextprime - order of A modulo P - Nth row of Pascal triangle - digits of Pi - study of the polynomial x^2 - x +41 - prime factors - pythagorean triples - study of K = A^2 - B^3 - quadratic residues - quadratic congruence - Sophie Germain numbers in a given range - fractions generatig sqrt(2) - primality test - twin primes after N - N = X^2 + Y^2.

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