def isprime(x):
  if x <= 0:
    return False
  if x == 2:
    return True
  temp = 3
  while temp <= int(x ** 0.5) + 1:
    if x % temp == 0: return False
    else: temp += 2
  return True


delta = lambda x, y: 2 * x + y + 1


a = [0, 0, 0]
for j in xrange(1001):
  if isprime(j):
    for i in xrange(-1000, 1001):
      n = 0
      tmp = j
      while 1:
        tmp += delta(n, i)
        if isprime(tmp):
          #print j, '\t', i, '\t', tmp
          n += 1
        else:
          break
      if n > a[0]:
        a[0] = n
        a[1] = i
        a[2] = j
print a[1] * a[2], '=', a[1], '*', a[2]