Mathematics Problem Archive
Showing 1-2 of 2 problems
GUY-A15
Open
Congruent Products of Consecutive Numbers
What is the least prime $p$ such that there are integers $a, k_1, k_2, k_3$ with $\prod_{i=1}^{k_1} (a+i) \equiv \prod_{i=1}^{k_2} (a+k_1+i) \equiv \p...
L2
GUY-A19b
Open
Cohen-Selfridge Problem on $\pm p^a \pm 2^b$
What is the least positive odd number not of the form $\pm p^a \pm 2^b$, where $p$ is an odd prime?...
L2