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| -rw-r--r-- | bip-0037.mediawiki | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/bip-0037.mediawiki b/bip-0037.mediawiki index 8179393..f1561be 100644 --- a/bip-0037.mediawiki +++ b/bip-0037.mediawiki @@ -195,7 +195,7 @@ When loading a filter with the <code>filterload</code> command, there are two pa Let N be the number of elements you wish to insert into the set and P be the probability of a false positive, where 1.0 is "match everything" and zero is unachievable. -The size S of the filter in bytes is given by <code>(-1 / pow(log(2), 2) * N * log(P)) / 8</code>. Of course you must ensure it does not go over the maximum size (36,000: selected as it represents a filter of 20,000 items with false positive rate of < 0.1% or 10,000 items and a false positive rate of < 0.0001%). +The size S of the filter in bytes is given by <code>(-1 / pow(log(2), 2) * N * log(P)) / 8</code>. Of course you must ensure it does not go over the maximum size (36,000: selected as it represents a filter of 20,000 items with false positive rate of < 0.1% or 10,000 items and a false positive rate of < 0.0001%). The number of hash functions required is given by <code>S * 8 / N * log(2)</code>. |