I think you've mistaken thousands of years for millions.

As per your own link:

  Solving for z_rec gives value around 1100, which converts to a cosmic time value around 400,000 years

▲ abainbridge 7 hours ago | parent [-]

Doh. Thanks.

	▲	magicalhippo 6 hours ago \| parent [-]
		If it makes you feel any better I had the same exact reaction as you and almost posted the same thing, but managed to catch my error just in time.