diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5c145485..baaeb8a8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.19', '1.18', '1.17', '1.16', '1.15', '1.14', '1.13' ]
+        go: [ '1.19', '1.18', '1.17', '1.16', '1.15', '1.14' ]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0251e9bc..dea213f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 # Changelog
 All notable changes to this library are documented in this file.
 
+## UNRELEASED - XXXX-XX-XX
+- Go `1.13` is not supported anymore by the library due to behavioral changes in the `math/big` package. The minimum version is now `1.14`.
+- UTILS: added `GetFactors`, `GetFactorPollardRho` and `GetFactorECM`.
+
 ## [4.1.0] - 2022-11-22 
 - Further improved the generalization of the code across schemes through the `rlwe` package and the introduction of a generic scale management interface.
 - All: uniformized the `prec` type to `uint` for `*big.Float` types.
diff --git a/go.mod b/go.mod
index 77c1419a..d1699c6e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/tuneinsight/lattigo/v4
 
-go 1.13
+go 1.14
 
 require (
 	github.com/kr/pretty v0.3.0 // indirect