That's a pretty big number... it's probably greater than Chrome can handle properly. If you test several similar numbers (10150878873354253, 10150878873354254, 10150878873354255, 10150878873354256 etc.) you can see that every other number fail to parse correctly.
You learn something new everyday! The number is a fb id for a photo. My mistake is using the id as a number instead of a string which probably makes more sense.
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