I am a regular Overleaf user. I wanted to compile $\mathbb{5}$. I can do it for $\mathbb{1}$(Or like $\mathbb{1}$). I have read this.

I have used this set of packages alongside the other necessary packages.

\usepackage{bbm} %%(The \mathbb{} effect for 1 only)
%\usepackage{newtxmath} %%(The \mathbb{} effect for digits)
%\usepackage{unicode-math} %(Only works with LuaLatex)

The only time I have a positive return is the case when I use usepackage{newtxmath}. But when I use the package, it ruins the whole text of the pdf.

  • 1
    @DavidCarlisle, \mathds{5} is not working for me. Commented Oct 14, 2020 at 10:45
  • With cmathbb package in the new version of TexLive.
    – M.Ahmadi
    Commented Oct 15, 2020 at 7:44

2 Answers 2


You could use the double struck from stix2, just taking enough from stix2.sty to define the one font not change the whole setup.

enter image description here

\DeclareMathAlphabet{\stixbb}{LS1}{stix2bb}   {m} {n}


  • I use \documentclass{amsart}. There will be no issues, right? Commented Oct 14, 2020 at 11:20
  • 2
    font setup in amsart is essentially same as article+amsmath so should be fine @RalphClausen Commented Oct 14, 2020 at 11:28
  • Thanks! @DavidCarlisle Commented Oct 14, 2020 at 11:38

This works out of the box in unicode-math. The package also supports \Bbbfive and the Unicode character 𝟝.

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