%0 Journal Article %T Supersingular distribution on average for congruence classes of primes %A Nahid Walji %J Mathematics %D 2013 %I arXiv %R 10.4064/aa142-4-7 %X We demonstrate the existence of a congruence class bias in the distribution of supersingular primes on average for elliptic curves over $\Q$. For example, we show that on average there are twice as many supersingular primes congruent to 2 mod 3 as there are congruent to 1 mod 3. Our result is obtained using the averaging approach of Fouvry-Murty along with ideas of David-Pappalardi. %U http://arxiv.org/abs/1307.5346v1