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+---
+layout: forum
+title: 'Re: Proof-of-work difficulty increasing'
+grand_parent: Forum Posts
+parent: Bitcoin Forum
+nav_order: 217
+date: 2010-07-16 17:29:28 UTC
+original: https://bitcointalk.org/index.php?topic=43.msg3537#msg3537
+---
+
+# Re: Proof-of-work difficulty increasing
+
+---
+
+```
+Re: Proof-of-work difficulty increasing
+July 16, 2010, 05:29:28 PM
+
+Yes, about 20 hours.  (120 conf / 6 blocks per hour = 20 hours)  That's the normal length of time before you can spend it.  You know long before that that you won one.
+```