The story
Formulated by the Swedish mathematician Harald Cramér in 1936.
Etymology from Wiktionary, CC BY-SA 4.0.
Cramér's conjecture
Today it means: An estimate for the size of gaps between consecutive prime numbers, stating that p_n+1-p_n=O(( log p_n)²), where pₙ denotes the nth prime number, O is big O notation, and log is the natural logarithm. Full definition →