1 files changed, 16 insertions, 0 deletions

diff --git a/072.txt b/072.txt
new file mode 100644
index 0000000..d99267c
--- /dev/null
+++ b/072.txt
@@ -0,0 +1,16 @@
+solved with wolframalpha.com:
+  sum phi(n), n=2 to 1000000
+
+   3039650753
++  9118948164
++ 15198149566
++ 21277458826
++ 27356832366
++ 33435937046
++ 39515212818
++ 45594757684
++ 51673635564
++ 57752969604
+-------------
+ 303963552391
+