import time

def IsPrime(n):
    if n % 2 == 0:
        return n == 2
    d = 3
    while d * d <= n and n % d != 0:
        d += 2
    return d * d > n


def gap(g,m,n):
    if m%2==0:
        m+=1
    for i in range(m,n,2):
        if IsPrime(i) and IsPrime(i+g):
            return i,i+g


starttime=time.time()
print(gap(4,1000000,2000000))
print(time.time()-starttime)
#(1000033, 1000037)
#0.00023555755615234375