diff --git a/include/bmath/mint.hh b/include/bmath/mint.hh
index 12356af..ff958fe 100644
--- a/include/bmath/mint.hh
+++ b/include/bmath/mint.hh
@@ -51,6 +51,7 @@ class mint {
   }
 
   [[nodiscard]] constexpr mint operator/(mint const other) const noexcept {
+    // TODO: if consteval
     if constexpr (other.get() == 0) {
       static_assert(false, "Cannot divide by 0");
     } else if (other.get() == 0) {
@@ -96,6 +97,7 @@ class mint {
     return *this;
   }
 
+  // TODO: check this
   constexpr mint operator++(int) noexcept {
     auto _this = *this;
 
diff --git a/include/bmath/sieve.hh b/include/bmath/sieve.hh
index 5df219e..e172e10 100644
--- a/include/bmath/sieve.hh
+++ b/include/bmath/sieve.hh
@@ -40,6 +40,7 @@ class Eratosthenes : public Sieve<Eratosthenes<Limit>, Limit> {
 
   [[nodiscard]] constexpr bool operator[](size_t const number) const {
     if consteval {
+      // TODO: does/can this run at compile time?
       if (number > Limit) {
         throw std::out_of_range(
             std::format("cannot determine primality of {} > size of sieve {}",
diff --git a/tests/test_sieve.cc b/tests/test_sieve.cc
index 19fa66d..2feee79 100644
--- a/tests/test_sieve.cc
+++ b/tests/test_sieve.cc
@@ -28,6 +28,7 @@ TEST(SieveTest, BasicConstruction) { Eratosthenes<100> sieve; }
 TEST(SieveTest, ValidateAgainstNaive) {
   Eratosthenes<1000> sieve;
 
+  // TODO: assert done at compile time
   for (size_t i = 0; i <= 1000; ++i) {
     EXPECT_EQ(sieve[i], naive_prime(i))
         << "Sieve disagrees with naive checker for " << i;