class Summation:
    def __init__(self, n, m):
        self.n = n
        self.m = m

    def calculate(self):
        n, m = self.n, self.m
        return ((n % m) * ((n + 1) % m) // 2) % m
        
T = int(input())
for _ in range(T):
    N, M = map(int, input().split())
    summation = Summation(N, M)
    print(summation.calculate())