Newbetuts

$H(n)=\lfloor\dfrac{b}{n}\rfloor- \lfloor \dfrac{a}{n} \rfloor=$ (roughly) # odd pairs $o, o+2 \in [a,b]$ such that $n \mid o$ or $n \mid o+2$

A problem about a sequence and prime factorization

Fermat's little theorem proof by Euler

Question on (Semi) Prime Counting Functions

Length of continued fractions

Prime elements in a noncommutative ring

How to show that all even perfect numbers are obtained via Mersenne primes?

$1$ as difference of composites with same number of prime factors and smallest examples

Is This a New Property I Have Found Pertaining to Mersenne Primes?

Rate of convergence of series of squared prime reciprocals

Prime one heap Nim

Prove that a squared number is an equivalence relation of $-1\pmod{p}$ [duplicate]

A problem about Prime Numbers and Perfect Squares

Smallest integer N such that among every ten consecutive larger integers is at least one having at least three distinct prime factors?

New posts in prime-numbers

Patterns in prime numbers

Primes for >1 (good expression)

Why do all Giuga numbers have exactly one odd prime factor which is congruent to 1 (mod 4) ?

primegaps w.r.t. the m first primes / jacobsthal's function

the number of ordered triplets(x,y,z) such that x,y,z are primes and (x^y) +1=z

Check if a number is Carmichael

$H(n)=\lfloor\dfrac{b}{n}\rfloor- \lfloor \dfrac{a}{n} \rfloor=$ (roughly) # odd pairs $o, o+2 \in [a,b]$ such that $n \mid o$ or $n \mid o+2$

A problem about a sequence and prime factorization

Fermat's little theorem proof by Euler

Question on (Semi) Prime Counting Functions

Length of continued fractions

Prime elements in a noncommutative ring

How to show that all even perfect numbers are obtained via Mersenne primes?

$1$ as difference of composites with same number of prime factors and smallest examples

Is This a New Property I Have Found Pertaining to Mersenne Primes?

Rate of convergence of series of squared prime reciprocals

Prime one heap Nim

Prove that a squared number is an equivalence relation of $-1\pmod{p}$ [duplicate]

A problem about Prime Numbers and Perfect Squares

Smallest integer N such that among every ten consecutive larger integers is at least one having at least three distinct prime factors?