For problem statement at 1000-1999/1700-1799/1740-1749/1749/problemD.txt this is a correct solution, but verifier at 1000-1999/1700-1799/1740-1749/1749/verifierD.go ends with All tests passed can you fix the verifier? package main

import (
	"fmt"
)

func power(base, exp int64) int64 {
	res := int64(1)
	base %= 998244353
	for exp > 0 {
		if exp%2 == 1 {
			res = (res * base) % 998244353
		}
		base = (base * base) % 998244353
		exp /= 2
	}
	return res
}

func isPrime(x int64) bool {
	if x < 2 {
		return false
	}
	for i := int64(2); i*i <= x; i++ {
		if x%i == 0 {
			return false
		}
	}
	return true
}

func main() {
	var n, m int64
	if _, err := fmt.Scan(&n, &m); err != nil {
		return
	}

	mod := int64(998244353)
	mMod := m % mod

	var totalSum int64
	if mMod == 1 {
		totalSum = n % mod
	} else if mMod == 0 {
		totalSum = 0
	} else {
		num := (power(mMod, n) - 1 + mod) % mod
		den := power((mMod-1+mod)%mod, mod-2)
		totalSum = (mMod * num) % mod * den % mod
	}

	P := int64(1)
	Uk := int64(1)
	USum := int64(0)

	for k := int64(1); k <= n; k++ {
		if isPrime(k) {
			P *= k
		}
		if P > m {
			break
		}
		count := (m / P) % mod
		Uk = (Uk * count) % mod
		USum = (USum + Uk) % mod
	}

	ans := (totalSum - USum + mod) % mod
	fmt.Println(ans)
}