# How to parse long numbers?
**URL:** https://discuss.elastic.co/t/how-to-parse-long-numbers/288783
**Category:** Logstash
**Created:** [November 9, 2021, 3:41pm UTC](https://discuss.elastic.co/t/how-to-parse-long-numbers/288783 "2021-11-09T15:41:20Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@rachelyang](https://discuss.elastic.co/u/rachelyang)
#### Post date: [November 9, 2021, 3:41pm UTC](https://discuss.elastic.co/t/how-to-parse-long-numbers/288783/1 "2021-11-09T15:41:20Z")
I have set up NUMBER type for item duration in the pattern of Logstash configuration as
%{NUMBER:Duration}
It can parse most of the numbers in the log files, like 9994568.872 , 20903.23, etc..
But it cannot parse the long numbers which contains letter 'E', like 1.1280996562E7
How shall I set the type of Duration? And I prefer to use number type. Do we have any replacement in Logstash?
Thanks,
---
### Author:  [@AquaX](https://discuss.elastic.co/u/AquaX)
#### Post date: [November 17, 2021, 1:29pm UTC](https://discuss.elastic.co/t/how-to-parse-long-numbers/288783/2 "2021-11-17T13:29:46Z")
Logstash is handling this field as a string by default. Have you tried converting the scientific notation field to a float using the mutate filter?
I believe that Elasticsearch is then able to automatically deal with scientific notation if it is sent in as not a string.
```auto
filter {
mutate {
convert => {
"duration" => "float"
}
}
}
```
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 15, 2021, 1:30pm UTC](https://discuss.elastic.co/t/how-to-parse-long-numbers/288783/3 "2021-12-15T13:30:03Z")
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